Exhibit 99.5

CONSENT OF PROSPECTIVE DIRECTOR

In accordance with Rule 438 promulgated under the Securities Act of 1933, as amended, I hereby consent to my being named in this Amendment No. 1 to Registration Statement on Form S-4 of Pacific Premier Bancorp, Inc. (“Pacific Premier”) and all amendments thereto (the “Registration Statement”), as a person who is to become a director of Pacific Premier and Pacific Premier Bank upon consummation of the Merger (as such term is defined in the Agreement and Plan of Reorganization, dated as of February 9, 2018, between Pacific Premier and Grandpoint Capital, Inc.) and to the filing of this consent as an exhibit to this Registration Statement.

/s/ DON M. GRIFFITH

Don M. Griffith

April 18, 2018