Christina Eleni Angelides and Zachary Joshua Kanin were married Saturday evening at the summer home of the bridegroom’s family in Harwich Port, Mass. Leading the ceremony was Pippi Kessler, a friend of the couple who received permission to officiate from the Commonwealth of Massachusetts.

The couple, both 27, met at Harvard, from which they graduated.

Ms. Angelides is keeping her name. She is a federal policy advocate at the Natural Resources Defense Council in New York. She is involved in advancing policies that promote energy efficiency and alternatives to fossil fuels.