485APOS

Registration Statement No. 333-144628

                           811-09137

As Filed with the Securities and Exchange Commission on May 16, 2011

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-6

REGISTRATION UNDER THE SECURITIES ACT OF 1933                [ X ]

Pre-Effective Amendment No. ____          [  ]

Post-Effective Amendment No._9___         [ X ]

and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940          [ X ]

Amendment No._97___          [ X  ]

Sun Life of Canada (U.S.) Variable Account I

Registrant

Sun Life Assurance Company of Canada (U.S.)

Depositor

One Sun Life Executive Park

Wellesley Hills, Massachusetts 02481

Depositor's Address

1-800-700-6554

Depositor's Telephone Number

Sandra DaDalt

Assistant Vice President and Senior Counsel

Sun Life Assurance Company of Canada (U.S.)

One Sun Life Executive Park

Wellesley Hills, Massachusetts 02481

Name and Address of Agent For Service

It is proposed that this filing will become effective (check appropriate box)

[  ]  immediately upon filing pursuant to paragraph (b) of Rule 485.

[  ]  on April 29, 2011 pursuant to paragraph (b) of Rule 485.

[  ]  60 days after filing pursuant to paragraph (a)(1) of Rule 485.

[ X ]  on July 18, 2011 pursuant to paragraph (a)(1) of Rule 485.

[  ]  This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

This Amendment No. 9 to the Registration Statement on Form N-6 (the "Registration Statement") (File Nos. 333-144628, 811-09137) is being filed pursuant to Rule 485(a) under the Securities Act of 1933, as amended, in order to add a supplement to the prospectus filed with Post-Effective Amendment No. 8 to the Registration Statement, which was filed on April 28, 2011. This Amendment does not otherwise delete, amend, or supersede any prospectus, statement of additional information, exhibit, or other information contained in Post-Effective Amendment No. 8 to the Registration Statement.

PART A

SUPPLEMENT DATED JULY 18, 2011

TO PROSPECTUS DATED APRIL 29, 2011

FOR SUN PROTECTOR VARIABLE UNIVERSAL LIFE INSURANCE

ISSUED BY SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)

SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT I

For Policies with Investment Start Dates on and after July 18, 2011, the Maximum Cost of Insurance is $30.70 per $1000 of Policy Net Amount at Risk and Supplemental Insurance Rider Net Amount at Risk.  The maximum charge possible is for an Insured male, standard, tobacco, Issue Age 85, Policy Year 15.

THIS SUPPLEMENT SHOULD BE READ AND RETAINED FOR FUTURE REFERENCE.

Sun Protector VUL 5-2011

PART B

The Statement of Additional Information is incorporated herein by reference to Post-Effective Amendment No. 8 to the Registration Statement for Sun Life of Canada (U.S.) Variable Account I, File No. 333-144628, filed with the Securities and Exchange Commission on April 28, 2011.

PART C

ITEM 26.  EXHIBITS

A. Resolution of the Board of Directors of Sun Life Assurance Company of Canada (U.S.), dated October 29, 1998, authorizing the establishment of Sun Life of Canada (U.S.) Variable Account I (Incorporated herein by reference to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form S-6, File No. 333-68601, filed with the Securities and Exchange Commission on December 9, 1998.)

B. None.

C. (1) Principal Underwriting Agreement (Incorporated herein by reference to Post-Effective Amendment No. 11 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, File No. 333-100829, filed with the Securities and Exchange Commission on April 30, 2009.)

(2) Amendment One to the Principal Underwriting Agreement (Incorporated herein by reference to Post-Effective Amendment No. 11 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, File No. 333-100829, filed with the Securities and Exchange Commission on April 30, 2009.)

(3) Amendment Two to Principal Underwriting Agreement. (Incorporated herein by reference to Post-Effective Amendment No. 12 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, File No. 333-100829, filed with the Securities and Exchange Commission on April 27, 2010.)

(4) Amendment Three to Principal Underwriting Agreement. (Incorporated herein by reference to Post-Effective Amendment No. 12 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, File No. 333-100829, filed with the Securities and Exchange Commission on April 27, 2010.)

D. (1)  Flexible Premium Combination Fixed and Variable Life Insurance Policy.  (Incorporated herein by reference to Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, File No. 333-144628, filed with the Securities and Exchange Commission on July 17, 2007.)

(2)  Supplemental Insurance Rider (Incorporated herein by reference to Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, File No. 333-144628, filed with the Securities and Exchange Commission on July 17, 2007.)

(3)  Loan Lapse Protection Rider (Incorporated herein by reference to Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, File No. 333-144628, filed with the Securities and Exchange Commission on July 17, 2007.)

(4)  No Lapse Protection Rider (Incorporated herein by reference to Post-Effective Amendment No. 3 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, File No. 333-144628, filed with the Securities and Exchange Commission on September 17, 2008.)

(5)  Surrender Charge Modification Rider(Incorporated herein by reference to Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, File No. 333-144628, filed with the Securities and Exchange Commission on July 17, 2007.)

(6)  Charitable Giving Benefit Rider (Incorporated herein by reference to Pre-Effective Amendment No. 2 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, File No. 333-143353, filed with the Securities and Exchange Commission on September 19, 2007.)

(7)  Travel Assistance Endorsement(Incorporated herein by reference to Pre-Effective Amendment No. 2 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, File No. 333-143353, filed with the Securities and Exchange Commission on September 19, 2007.)

(8)  Accelerated Death Benefit Rider (Incorporated herein by reference to Pre-Effective Amendment No. 1 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form S-6, File No. 333-68601, filed with the Securities and Exchange Commission on April 27, 1999.)

 (9)  Payment of Stipulated Premium Rider (Incorporated herein by reference to Pre-Effective Amendment No. 1 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form S-6, File No. 333-68601, filed with the Securities and Exchange Commission on April 27, 1999.)

(10)  Waiver of Monthly Deductions Rider (Incorporated herein by reference to Post-Effective Amendment No. 4 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form S-6, File No. 333-68601, filed with the Securities and Exchange Commission on February 12, 2001.)

E. Application for Flexible Premium Combination Fixed and Variable Life Insurance Policy. (Incorporated herein by reference to Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, File No. 333-144628, filed with the Securities and Exchange Commission on July 17, 2007.)

F. (1)  Certificate of Incorporation of Sun Life Assurance Company of Canada (U.S.) (Incorporated herein by reference to the Depositor's Form 10-K, File No. 333-82824, filed with the Securities and Exchange Commission on March 29, 2004.)

(2)  Bylaws of the Depositor, as amended March 19, 2004 (Incorporated herein by reference to the Depositor's Form 10-K, File No. 333-82824, filed with the Securities and Exchange Commission on March 29, 2004.)

G. Specimen Reinsurance Contract. (Incorporated herein by reference to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, File No. 333-100829, filed with the Securities and Exchange Commission on October 30, 2002.)

H.           (1)      Participation Agreement, dated February 17, 1998, by and among AIM Variable Insurance Funds, Inc., AIM Distributors, Inc., Sun Life Assurance Company of Canada (U.S.), and Clarendon Insurance Agency, Inc. (Incorporated herein by reference to Post-Effective Amendment No. 1 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account F on Form N-4, Exhibit 8d, File No. 333-82957, filed with the Securities and Exchange Commission on February 3, 2000.)

(2)      Amended and Restated Participation Agreement, dated December 13, 2004, by and among Sun Capital Advisers Trust, Sun Capital Advisers, Inc., Sun Life Insurance and Annuity Company of New York and Sun Life Assurance Company of Canada (U.S.) (Incorporated herein by reference to Post-Effective Amendment No. 8 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account F on Form N-4, Exhibit 8e, File No. 333-83516, filed with the Securities and Exchange Commission on April 29, 2005.)

(3)      Amended and Restated Participation Agreement, dated September 1, 2004, by and among Sun Life Assurance Company of Canada (U.S.), Variable Insurance Products Fund and Fidelity Distributors Corporation (Incorporated herein by reference to Post-Effective Amendment No. 8 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account F on Form N-4, Exhibit 8g, File No. 333-83516, filed with the Securities and Exchange Commission on April 28, 2005.)

(4)      Participation Agreement, dated May 1, 2001, by and among Sun Life Assurance Company of Canada (U.S.), Clarendon Insurance Agency, Inc., Alliance Capital Management L.P. and Alliance Fund Distributors, Inc. (Incorporated herein by reference to Post-Effective Amendment No. 10 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account F on Form N-4, Exhibit 8k, File No. 333-82957, filed with the Securities and Exchange Commission on April 23, 2004.)

(5)      Participation Agreement, dated September 16, 2002, by and among the Franklin Templeton Variable Insurance Products Trust, Franklin Templeton Distributors, Inc, Sun Life Insurance and Annuity Company of New York and Sun Life Assurance Company of Canada (U.S.) (Incorporated herein by reference to the Registration Statement of KBL Variable Account A on Form N-4, Exhibit 8g, File No. 333-102278, filed with the Securities and Exchange Commission on December 31, 2002.)

(6)      Participation Agreement, dated February 17, 1998, by and among Goldman Sachs Variable Insurance Trust, Goldman, Sachs & Co., and Sun Life Assurance Company of Canada (U.S.) (Incorporated herein by reference to Post-Effective Amendment No. 13 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account F on Form N-4, Exhibit 8b, File No. 033-41628, filed with the Securities and Exchange Commission on April 26, 1999.)

(7)      Amended and Restated Participation Agreement, dated November 6, 2002, by and among MFS/Sun Life Series Trust, Sun Life Insurance and Annuity Company of New York, Sun Life Assurance Company of Canada (U.S.) and Massachusetts Financial Services Company (Incorporated herein by reference to Post-Effective Amendment No. 3 to the Registration Statement of Sun Life (N.Y.) Variable Account C on Form N-4, Exhibit 8a, File No. 333-107983, filed with the Securities and Exchange Commission on May 28, 2004.)

(8)      Participation Agreement, dated July 15, 2002, by and among Sun Life Assurance Company of Canada (U.S.), Deutsche Asset Management VIT Funds and Deutsche Asset Management, Inc. (Incorporated herein by reference to Post-Effective Amendment No. 2 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account G on Form S-6, Exhibit 8o, File No. 333-65048, filed with the Securities and Exchange Commission on July 3, 2002.)

(9)      Participation Agreement, dated September 30, 2002, by and among Sun Life Assurance Company of Canada (U.S.), Sun Life Insurance and Annuity Company of New York, First Eagle Sogen Variable Funds, Inc. and Arnhold and S. Bleichroeder, Inc. (Incorporated herein by reference to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, Exhibit H9, File No. 333-143353, filed with the Securities and Exchange Commission on May 30, 2007.)

(10) Participation Agreement, dated September 16, 2002, by and among Sun Life Assurance Company of Canada (U.S.), Sun Life Insurance and Annuity Company of New York, PIMCO Variable Insurance Trust and PIMCO Funds Distributors LLC. (Incorporated herein by reference to Post-Effective Amendment No. 3 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, Exhibit H10, File No. 333-59662, filed with the Securities and Exchange Commission on February 26, 2003.)

(11)   Participation Agreement, dated December 1, 2004, by and among Wanger Advisors Trust, Columbia Funds Distributor, Inc., Sun Life Assurance Company of Canada (U.S.) and Sun Life Insurance and Annuity Company of New York.  (Incorporated herein by reference to the Registration Statement of Sun Life (N.Y.) Variable Account J on Form N-6, Exhibit H20, File No. 333-136435, filed with the Securities and Exchange Commission on August 9, 2006.)

(12)    Participation Agreement, dated May 1, 2004, by and among Sun Life Assurance Company of Canada (U.S.), The Universal Institutional Funds, Inc., Morgan Stanley & Co. Incorporated and Morgan Stanley Investment Management Inc. (Incorporated herein by reference to Post-Effective Amendment 5 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account G on Form N-6, File No. 333-111688, filed with the Securities and Exchange Commission on April 27, 2007.)

 (13) Participation Agreement, dated August 6, 2004, by and among Sun Life Assurance Company of Canada (U.S.), Van Kampen Life Investments Trust, Van Kampen Funds Inc., Van Kampen Asset Management. (Incorporated herein by reference to Post-Effective Amendment No. 4 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, Exhibit H16, File No. 333-100831, filed with the Securities and Exchange Commission on April 29, 2005.)

(14) Participation Agreement, dated December 31, 2002, by and among Oppenheimer Variable Account Funds, OppenheimerFunds, Inc. and Sun Life Assurance Company of Canada (U.S.). (Incorporated herein by reference to Post-Effective Amendment No. 4 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, Exhibit H17, File No. 333-100831, filed with the Securities and Exchange Commission on April 29, 2005.)

(15)    Restated Participation Agreement, dated April 1, 2007, by and among Sun Life Assurance Company of Canada (U.S.), Sun Life Insurance and Annuity Company of New York, Independence Life and Annuity Company, Columbia Funds Variable Insurance Trust I, Columbia Management Advisors, LLC and Columbia Management Distributors, Inc. (Incorporated herein by reference to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, Exhibit H15, File No. 333-143353, filed with the Securities and Exchange Commission on May 30, 2007.)

(16)      Participation Agreement, dated May 13, 2004, by and among Sun Life Assurance Company of Canada (U.S.), Merrill Lynch Variable Series Funds, Inc., Merrill Lynch Investment Managers, L.P. and FAM Distributors, Inc. (Incorporated herein by reference to Post-Effective Amendment No. 2 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account G on Form N-6, File No. 333-111688, filed with the Securities and Exchange Commission on December 30, 2005.)

I. Third Party Administration Agreement between Sun Life Assurance Company of Canada (U.S.) and McCamish Systems, LLC.  (Incorporated herein by reference to Pre-Effective Amendment No. 2 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, File No. 333-143354, filed with the Securities and Exchange Commission on October 10, 2007.)

J.            (1) Powers of Attorney.  (Incorporated herein by reference to Post-Effective Amendment No. 8 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, File No. 333-144628, filed with the Securities and Exchange Commission on April 28, 2011.)

(2) Resolution of the Board of Directors of the Depositor dated March 24, 2011, authorizing the use of Powers of Attorney for Officer signatures. (Incorporated herein by reference to Post-Effective Amendment No. 42 to the Registration Statement on Form N-4, File No. 333-83516, filed with the Securities and Exchange Commission on April 27, 2011.)

K. Legal Opinion.  (Incorporated herein by reference to Post-Effective Amendment No. 8 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account I on Form N-6, File No. 333-144628, filed with the Securities and Exchange Commission on April 28, 2011.)

L.           None.

M.           None.

N.           Consent of Independent Registered Public Accounting Firm.

O.           None.

P.           None.

Q.           None.

ITEM 27.  DIRECTORS AND OFFICERS OF THE DEPOSITOR

Name and Principal Business Address	Positions and Offices With Depositor
Thomas A. Bogart Sun Life Assurance Company of Canada 150 King Street West Toronto, ON  M5H 1J9	Director
Ronald H. Friesen Sun Life Assurance Company of Canada (U.S.) One Sun Life Executive Park Wellesley Hills, MA  02481	Director and Senior Vice President and Chief Financial Officer and Treasurer
Scott M. Davis Sun Life Assurance Company of Canada (U.S.) One Sun Life Executive Park Wellesley Hills, MA  02481	Director and Senior Vice President and General Counsel
Stephen L. Deschenes Sun Life Assurance Company of Canada (U.S.) One Sun Life Executive Park Wellesley Hills, MA 02481	Director and Senior Vice President and General Manager, Annuities
Janet V. Whitehouse Sun Life Assurance Company of Canada (U.S.) One Sun Life Executive Park Wellesley Hills, MA  02481	Senior Vice President and General Manager, Individual Life Insurance
Westley V. Thompson Sun Life Assurance Company of Canada (U.S.) One Sun Life Executive Park Wellesley Hills, MA 02481	Chairman and Director and President, SLF U.S.
Priscilla S. Brown Sun Life Assurance Company of Canada (U.S.) One Sun Life Executive Park Wellesley Hills, MA 02481	Senior Vice President and Head of U.S. Marketing
Stephen C. Peacher Sun Life Assurance Company of Canada 150 King Street West Toronto Ontario Canada  M5H 1J9	Executive Vice President and Chief Investment Officer
Larry R. Madge Sun Life Assurance Company of Canada  (U.S.) One Sun Life Executive Park Wellesley Hills, MA  02481	Senior Vice President and Chief Actuary
Michael S. Bloom Sun Life Assurance Company of Canada (U.S.) One Sun Life Executive Park Wellesley Hills, MA 02481	Assistant Vice President and Senior Counsel and Secretary
Sean N. Woodroffe Sun Life Assurance Company of Canada (U.S.) One Sun Life Executive Park Wellesley Hills, MA 02481	Vice President, Human Resources
David J. Healy Sun Life Assurance Company of Canada (U.S.) One Sun Life Executive Park Wellesley Hills, MA 02481	Senior Vice President, Sun Life Financial U.S. Operations
Terrence J. Mullen Sun Life Assurance Company of Canada (U.S.) One Sun Life Executive Park Wellesley Hills, MA 02481	Director
Colm J. Freyne Sun Life Assurance Company of Canada 150 King Street West Toronto, ON  M5H 1J9	Director

ITEM 28.  PERSONS CONTROLLED BY OR UNDER COMMON CONTROL WITH THE DEPOSITOR OR THE REGISTRANT

No person is directly or indirectly controlled by the Registrant.  The Registrant is a separate account of Sun Life Assurance Company of Canada (U.S.), which is ultimately controlled by Sun Life Financial.

The organization chart of Sun Life Financial is incorporated by reference to Post-Effective Amendment No. 42 to the Registration Statement of Sun Life of Canada (U.S.) Variable Account F on Form N-4, File No. 333-83516, filed April 27, 2011.

None of the companies listed in such organization chart is a subsidiary of the Registrant; therefore, the only financial statements being filed are those of Sun Life Assurance Company of Canada (U.S.).

ITEM 29.  INDEMNIFICATION

Pursuant to Section 145 of the Delaware Corporation Law, Article 8 of the By-laws of Sun Life Assurance Company of Canada (U.S.) provides for the indemnification of directors, officers and employees of Sun Life Assurance Company of Canada (U.S.).  Insofar as indemnification for liability arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of Sun Life Assurance Company of Canada (U.S.) pursuant to the certificate of incorporation, by-laws, or otherwise, Sun Life (U.S.) has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Act and is, therefore, unenforceable.  In the event that a claim for indemnification against such liabilities (other than the payment by Sun Life (U.S.) of expenses incurred or paid by a director, officer, controlling person of Sun Life (U.S.) in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, Sun Life (U.S.) will submit to a court of appropriate jurisdiction the question whether such indemnification by them is against public policy as expressed in the Act, unless in the opinion of their counsel the matter has been settled by controlling precedent, and will be governed by the final adjudication of such issue.

ITEM 30.  PRINCIPAL UNDERWRITERS

(a) Clarendon Insurance Agency, Inc., which is a wholly-owned subsidiary of Sun Life Assurance Company of Canada (U.S.), acts as general distributor for the Registrant, Sun Life of Canada (U.S.) Variable Accounts C, D, E, F, G and K, Keyport Variable Account A, KMA Variable Account, Keyport Variable Account I, KBL Variable Account A, KBL Variable Annuity Account, Sun Life (N.Y.) Variable Accounts A, B, C, D, J and N and Money Market Variable Account, High Yield Variable Account, Capital Appreciation Variable Account, Government Securities Variable Account, World Governments Variable Account and Total Return Variable Account.

(b)

Name and Principal	Position and Offices
Business Address*	with Underwriter
Terrence J. Mullen	President and Director
Scott M. Davis	Director
Ronald H. Friesen	Director
Ann B. Teixeira	Assistant Vice President, Compliance
Michael S. Bloom	Secretary
Kathleen T. Baron	Chief Compliance Officer
William T. Evers	Assistant Vice President and Senior Counsel
Jane F. Jette	Financial/Operations Principal and Treasurer
Michelle Greco	Counsel
Matthew S. MacMillen	Tax Officer

*The principal business address of all directors and officers of the principal underwriter is One Sun Life Executive Park, Wellesley Hills, Massachusetts 02481.

(c) Inapplicable.

ITEM 31.  LOCATION OF ACCOUNTS AND RECORDS

Accounts, books and other documents required to be maintained by Section 31(a) of the Investment Company Act of 1940 and the Rules promulgated thereunder are maintained, in whole or in part, by Sun Life Assurance Company of Canada (U.S.) at its offices at One Sun Life Executive Park, Wellesley Hills, Massachusetts 02481 or at the offices of Clarendon Insurance Agency, Inc., at One Sun Life Executive Park, Wellesley Hills, Massachusetts 02481.

ITEM 32.  MANAGEMENT SERVICES

Not applicable.

ITEM 33.  FEE REPRESENTATION

Sun Life Assurance Company of Canada (U.S.)("Sun Life of Canada (U.S.)") hereby represents that the aggregate fees and charges under the Policy are reasonable in relation to the services rendered, the expenses expected to be incurred, and the risks assumed by Sun Life of Canada (U.S.).

SIGNATURES

As required by the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant has duly caused this Post-Effective Amendment to the Registration Statement to be signed on its behalf, in the Town of Wellesley Hills, and Commonwealth of Massachusetts on this 16th day of May, 2011.

SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT I

(Registrant)

SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)

(Depositor)

By: ___/s/ Westley V. Thompson______________

Westley V. Thompson

President, SLF U.S.

Attest:	__/s/ Susan J. Lazzo_________________
	Susan J. Lazzo
	Assistant Vice President & Senior Counsel

As required by the Securities Act of 1933, this Registration Statement has been signed by the following persons in the capacities with the Depositor, Sun Life Assurance Company of Canada (U.S.), and on the dates indicated.

SIGNATURE	TITLE	DATE
/s/ Westley V. Thompson	Director and President, SLF U.S.	May 16, 2011
Westley V. Thompson	(Principal Executive Officer)
/s/ Ronald H. Friesen	Director and Senior Vice President and Chief Financial	May 16, 2011
Ronald H. Friesen	Officer and Treasurer
	(Principal Financial Officer)
/s/ Douglas C. Miller	Vice President and Controller	May 16, 2011
Douglas C. Miller	(Principal Accounting Officer)
*By: /s/ Susan J. Lazzo	Attorney-in-Fact for:	May 16, 2011
Susan J. Lazzo
	Stephen L. Deschenes, Director
	Terrence J. Mullen, Director
	Scott M. Davis, Director
	Thomas A. Bogart, Director
	Colm J. Freyne, Director

*Susan J. Lazzo has signed this document on the indicated date on behalf of the above Directors and Officers for the Depositor pursuant to powers or attorney duly executed by such persons and a resolution of the Board of Directors authorizing use of powers of attorney for Officer signatures. Resolution of the Board of Directors is incorporated herein by reference to Post-Effective Amendment No. 42 to the Registration Statement on Form N-4, File No. 333-83516, filed on April 27, 2011.

EXHIBIT INDEX

N Consent of Independent Registered Public Accounting Firm

EX-99.N OTH OPINIONS

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Post-Effective Amendment No. 9 to Registration Statement No. 333-144628 (the “Registration Statement”) on Form N-6 of our report dated April 22, 2011, relating to the financial statements of Sun Life of Canada (U.S.) Variable Account I, and to the incorporation by reference of our report dated March  28, 2011, relating to the consolidated financial statements of Sun Life Assurance Company of Canada (U.S.)  (the “Company”) (which expresses an unqualified opinion and includes an explanatory paragraph, relating to the Company changing its method of accounting and reporting for other-than-temporary impairments in 2009 and changing its method of accounting and reporting for the fair value measurement of certain assets and liabilities in 2008, as discussed in Note 1 and Note 5, respectively, of the consolidated financial statements) appearing in the Statement of Additional Information which is part of the Post-Effective Amendment No. 8 to the Registration Statement, which is incorporated by reference within this Post-Effective Amendment No. 9 to the Registration Statement, and to the reference to us under the heading “Independent Registered Public Accounting Firm” in the Statement of Additional Information appearing in Post-Effective Amendment No. 8 to the Registration Statement.

/s/DELOITTE & TOUCHE LLP

Boston, Massachusetts

May 13, 2011