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Amica Mutual Insurance Co. announced that Edmund Shallcross III has been named the company’s next chief executive officer and president, effective Oct. 1, 2022.

Shallcross will succeed Robert A. DiMuccio, who is retiring after 31 years of distinguished service, including 17 as CEO. DiMuccio will serve as non-executive chair of the board until Dec. 31, 2022.

Shallcross is currently senior vice president and general manager of Amica Life. He first joined Rhode Island-based Amica in 2007 as a senior assistant vice president in the accounting department. He later took on the role of vice president at Amica Life, overseeing the organization’s financial and operational activities. Before joining Amica, Shallcross spent 12 years at KPMG’s property/casualty insurance practice, where Amica was one of his clients.

The company said the selection of Amica’s next CEO came after a year-long search process in collaboration with consultant Heidrick & Struggles.


Brethren Mutual Insurance Co. President and Chief Executive Officer Mike W. Brashears will step down from his leadership position on Dec. 31, 2022, after a 44-year career with the company.

The board of directors has appointed Robert F. Glass, currently vice president of underwriting and marketing, to succeed Brashears in the role of president/CEO, effective Jan. 1, 2023. During the first three months of 2023, Brashears will serve in an advisory role to ensure a smooth transition of leadership until his official retirement on April 1, 2023. He will continue his position as a Brethren Mutual board member in retirement.

Glass joined Brethren Mutual in October 2017 as the director of underwriting. He was promoted to managing director of underwriting and marketing in November 2018 and subsequently promoted to this current position in April 2020.