The Honorable Sharon Pratt, J.D., former mayor of Washington, D.C., will be the guest preacher at Union Chapel in Oak Bluffs on Sunday, July 6.

Ms. Pratt is also the founder and manager of Pratt Consulting, a company that brings strategic consulting support to government, commercial and non-profit clients.

Services begin at 10 a.m., with an organ prelude starting at 9:40 a.m.

Union Chapel is located at the end of Circuit avenue, at the intersection of Kennebec and Narragansett avenues in Oak Bluffs.