Exhibit 24

Power of Attorney

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Marc Grandisson and François Morin as his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign Arch Capital Group Ltd.’s Annual Report on Form 10-K for the year ended December 31, 2020 and any and all amendments and supplements thereto, and to file the same with the Commission, granting unto said attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Signature

Title

Date

/s/ Marc Grandisson Marc Grandisson

Chief Executive Officer (Principal Executive Officer)

February 26, 2021

/s/ François Morin François Morin

Executive Vice President and Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer) and Treasurer

February 26, 2021

/s/ John M. Pasquesi John M. Pasquesi

Chairman of the Board

February 26, 2021

/s/ John L. Bunce, Jr. John L. Bunce, Jr.

Director

February 26, 2021

/s/ Eric W. Doppstadt Eric W. Doppstadt

Director

February 26, 2021

/s/ Laurie S. Goodman Laurie S. Goodman

Director

February 26, 2021

/s/ Moira Kilcoyne Moira Kilcoyne

Director

February 26, 2021

/s/ Louis J. Paglia Louis J. Paglia

Director

February 26, 2021

/s/ Brian S. Posner Brian S. Posner

Director

February 26, 2021

/s/ Eugene S. Sunshine Eugene S. Sunshine

Director

February 26, 2021

/s/ John D. Vollaro John D. Vollaro

Director

February 26, 2021

/s/ Thomas R. Watjen Thomas R. Watjen

Director

February 26, 2021