POWER OF ATTORNEY

	Know all by these presents, that the undersigned
hereby constitutes and appoints each of John J. Gavin, Jr.
and Michael J. Cayer, or either of them signing singly, and
with full power of substitution, the undersigned's true and
lawful attorney-in-fact to:

prepare, execute in the undersigned's name and on the
undersigned's behalf, and submit to the U.S. Securities and
Exchange Commission (the "SEC") a Form ID, including
amendments thereto, and any other documents necessary or
appropriate to obtain codes and passwords enabling the
undersigned to make electronic filings with the SEC of
reports required by Section 16(a) of the Securities
Exchange Act of 1934 or any rule or regulation of the SEC;

execute for and on behalf of the undersigned, in the
undersigned's capacity as an officer and/or director of
BladeLogic, Inc.  (the "Company"), Forms 3, 4, and 5 in
accordance with Section 16(a) of the Securities Exchange
Act of 1934 and the rules thereunder;

do and perform any and all acts for and on behalf of the
undersigned which may be necessary or desirable to complete
and execute any such Form 3, 4, or 5, complete and execute
any amendment or amendments thereto, and timely file such
form with the SEC and any stock exchange or similar
authority; and

take any other action of any type whatsoever in connection
with the foregoing which, in the opinion of such
attorney-in-fact, may be of benefit to, in the best
interest of, or legally required by, the undersigned, it
being understood that the documents executed by such
attorney-in-fact on behalf of the undersigned pursuant to
this Power of Attorney shall be in such form and shall
contain such terms and conditions as such attorney-in-fact
may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to each such attorney-in-fact
full power and authority to do and perform any and every
act and thing whatsoever requisite, necessary, or proper to
be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the
undersigned might or could do if personally present, with
full power of substitution or revocation, hereby ratifying
and confirming all that such attorney-in-fact, or such
attorney-in-fact's substitute or substitutes, shall
lawfully do or cause to be done by virtue of this power of
attorney and the rights and powers herein granted. The
undersigned acknowledges that the foregoing
attorneys-in-fact, in serving in such capacity at the
request of the undersigned, are not assuming, nor is the
Company assuming, any of the undersigned's responsibilities
to comply with Section 16 of the Securities Exchange Act of
1934.

	This Power of Attorney shall remain in full force and
effect until the undersigned is no longer required to file
Forms 3, 4, and 5 with respect to the undersigned's
holdings of and transactions in securities issued by the
Company, unless earlier revoked by the undersigned in a
signed writing delivered to the foregoing
attorneys-in-fact.

	IN WITNESS WHEREOF, the undersigned has caused this
Power of Attorney to be executed as of this 23rd day of
July, 2007.



			/s/ Christopher Schiavo, attorney-in-fact

			Battery Ventures VI, L.P.
			Battery Partners VI, LLC
			Battery Investment Partners VI, LLC
			Thomas J. Crotty
			Oliver D. Curme
			Richard D. Frisbie
			Morgan M. Jones
			Kenneth P. Lawler
			Mark H. Sherman
			R. David Tabors
			Scott R. Tobin