Power of Attorney

	Know all by these presents that the undersigned hereby
constitutes and appoints Curt A. Christiansen and Nancy Gray, the
undersigned's true and lawful attorney-in-fact to:

	(1) execute for and on behalf of the undersigned, in the
undersigned's capacity as an officer and/or director of Pacific
Mercantile Bancorp (the Company), Forms 3, 4, and 5 in accordance
with Section 16(a) of the Securities Exchange Act of 1934 and the
rules thereunder, and any other forms or reports the undersigned may
be required to file in connection with the undersigned's ownership,
acquisition, or disposition of securities of the Company;

	(2) do an 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, or other form or report, and timely
file such form or report with the United States Securities and
Exchange Commission and any stock exchange or similar authority; and

	(3) 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 issues 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 28th  day of November, 2018.


/s/ James F. Deutsch