Exhibit 23.10 CONSENT OF PERSON ABOUT TO BECOME A DIRECTOR -------------------------------------------- Pursuant to (S)230.438 of Regulation C promulgated under the Securities Act of 1933, as amended, the undersigned hereby consents to his being named in the Proxy Statement-Prospectus which forms a part of the Registration Statement on Form S-4 relating to the proposed merger of Heritage Financial Services, Inc. with and into Midwest Acquisition Corporation, a subsidiary of First Midwest Bancorp, Inc., as a person who is expected to become a director of First Midwest Bancorp, Inc. upon the consummation of such merger. By: /s/ Richard T. Wojcik --------------------- Richard T. Wojcik By: /s/ Jack Payan -------------- Jack Payan By: /s/ John L. Sterling -------------------- John L. Sterling April 9, 1998 Blue Island, Illinois