SECTION 16
				        POWER OF ATTORNEY
                                        TOMMY DINH NGUYEN

      The undersigned hereby constitutes and appoints the individuals named on Schedule A
attached hereto and as may be amended from time to time, or any of them signing singly, with
full power of substitution and resubstitution, the undersigned's true and lawful attorney in
fact to:

      1.  as may be required, prepare, execute in the undersigned's name and on the
          undersigned's behalf, and submit to the United States 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, as amended,
          or any rule or regulation of the SEC;

      2.  execute for and on behalf of the undersigned, in the undersigned's capacity as a
          Section 16 reporting person of the applicable registered investment companies
          (and any successor companies) listed on Schedule A attached hereto, as amended
          from time to time, and any other registered investment company affiliated with
          or established by Pacific Investment Management Company LLC ("PIMCO"), for
          which the undersigned becomes a Section 16 reporting person (each, a "Fund"),
          Forms 3, 4, and 5 in accordance with Section 16 of the Securities Exchange Act
          of 1934, as amended, and the rules thereunder;

      3.  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

      4.  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 and resubstitution 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 any
Fund assuming, any of the undersigned's responsibilities to comply with Section 16 of the
Securities Exchange Act of 1934, as amended.

      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 any Fund, 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 14th day of July, 2015.


                                                      /s/ Tommy Dinh Nguyen
						      Tommy Dinh Nguyen




                                         SCHEDULE A

                                    FUND NAME AND SYMBOL


1.	MONTGOMERY STREET INCOME SECURITIES, INC  (MTS)





                         INDIVIDUALS APPOINTED AS ATTORNEY-IN-FACT,
                     WITH FULL POWER OF SUBSTITUTION AND RESUBSTITUTION

1.	Youse Guia, Chief Compliance Officer of the Funds, Deptuty Chief
	Compliance Officer of PIMCO
2.      Jennifer Durham, Managing Director, Chief Compliance Officer of PIMCO
3.	Kevin Broadwater, Executive Vice President of PIMCO
4.	Richard Froio, Senior Vice President, Deputy Chief Compliance Officer
	of PIMCO
5.	Raulin Villegas, Vice President, Compliance Officer of PIMCO
6.	Joshua D. Ratner, Vice President, Secretary and Chief Legal Officer
	of the Funds, Executive Vice President and Attorney of PIMCO