Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the use in this Registration Statement on FormS-1 of our report dated March 22, 2019 relating to the consolidated financial statements of Mayville Engineering Company, Inc. and Subsidiaries appearing in the Prospectus, which is part of this Registration Statement, and to the reference to us under the heading “Experts” in such Prospectus.
/s/ DELOITTE & TOUCHE LLP
Milwaukee, Wisconsin
April 12, 2019