EX-23 2 mmc11k12312017exhibit23.htm CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM Exhibit


Exhibit 23


CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-69776 and 333-176085 on Form S-8 of our report dated June 29, 2018, relating to the financial statements and financial statement schedule of Marsh & McLennan Companies 401(k) Savings & Investment Plan appearing in this Annual Report on Form 11-K of Marsh & McLennan Companies 401(k) Savings & Investment Plan for the year ended December 31, 2017.
/s/ Deloitte & Touche LLP
New York, New York
June 29, 2018