Arbella Appoints Susan Kostro as Senior Vice President of Commercial Lines

QUINCY, Mass., November 25, 2019 The Arbella Insurance Group is pleased to announce the appointment of Susan Kostro as senior vice president of Commercial Lines. Reporting to Arbella CEO John Donohue, Kostro will lead the Arbella Commercial Lines organization and will be responsible for all functional areas of the department. Her responsibilities will include strategic initiatives to grow the company’s commercial business in Massachusetts, Connecticut, New Hampshire and Rhode Island, while maintaining and strengthening the strong relationships that Arbella enjoys with its 350 commercial insurance agents.

“We are delighted to have Susan join the Arbella team,” said John Donohue, chairman, president and chief executive officer of Arbella Insurance Group. “Her breadth of experience and commitment to strong agency relationships and employee development position her well for success at Arbella. She has already hit the ground running."

Kostro is a seasoned executive with more than 30 years of commercial underwriting leadership and technical experience. A native New Englander, she brings a deep knowledge of the area to the role. Most recently, she was senior vice president and chief underwriting officer for Liberty Mutual’s commercial public entity division. She spent seventeen years in leadership roles with AIG and AIG Lexington in their public entity division before joining the newly formed Ironshore which was eventually acquired by Liberty Mutual. Her experience includes achieving large growth and production goals, successfully building products, leading distribution and marketing efforts and developing and leading underwriting teams.

Kostro received a Master of Business Administration in Finance from Bentley University and a Bachelor of Business Administration in Finance from the University of Massachusetts at Amherst. She is a resident of Belmont and is passionate about her charity work and regularly volunteers in her community.

About the Arbella Insurance Group

Established in 1988, the Arbella Insurance Group ( is a company with more than $800M in revenue with approximately $1.5B in assets, headquartered in Quincy, Massachusetts. Arbella is a customer-focused regional property and casualty insurance company, providing personal and business insurance in Massachusetts and Connecticut, and business insurance in Rhode Island and New Hampshire. Recognized as one of the Boston Business Journal’s “Best Places to Work” for eleven consecutive years, Arbella is deeply committed to maintaining high levels of employee satisfaction and a positive workplace culture.

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For more information:

Christine Williamson

Greenough Communications