Thomas May Peirce

Founder & Principal

1865 - 1896

Ruth Stong Peirce

Principal

1896 - 1898

Mary B. Peirce

Principal

1898 - 1960

Thomas May Peirce III

President

1946 - 1981

Dr. Raymond C. Lewin

President

1981 - 1991

Dr. Arthur J. Lendo

Managing Partner/President

1991 - 2009

James J. Mergiotti

President & CEO

2009 - 2018

Dr. Mary Ellen Caro

President & CEO

2018 - Present