We have a number of executive changes and board appointments to tell you about at Progressive, Hamilton Insurance Group, QBE North America and Arbella Insurance Group.

Progressive said it has made a number of changes in its executive leadership, effective April 1.

Pat Callahan will be the new president of Progressive’s personal lines group, replacing John Sauerland. He’s a 12-year veteran of the insurer and has held various executive roles there. Souerland, in turn will become chief financial officer, replacing Brian Domeck after he retires.

As well, Tricia Griffith has been named Progressive’s new personal lines chief operating officer, and will oversee the division’s personal lines, claims and customer relationship management groups.

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Hamilton Insurance Group, the Bermuda-based holding company of Hamilton Re and Hamilton USA, appointed Joan Lamm-Tennant to its board of directors.

Lamm-Tennant is global chief economist and risk strategist at Guy Carpenter & Company. Meanwhile, she is transitioning into a new role as CEO of a Microinsurance Venture Incubator launched at the World Economic Forum in January by an insurance company-consortium including Guy Carpenter and Hamilton Insurance Group.

Lamm-Tennant’s expertise covers areas including emerging market growth strategy, enterprise risk modeling and putting into place risk-based decision processes that result in capital efficiencies.

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QBE North America said that Mark Cantin will become president, field operations as of March 30. In his new role, Cantin will lead sales and marketing activities for QBE North America, including producer relationships, distribution strategies and brand management, and building out the supporting field organization.

Catin is a veteran property/casualty industry executive who has held management positions at companies including Liberty Mutual and most recently, USI Insurance Services.

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Arbella Insurance Group in Quincy, Mass., has appointed two new board members: Joseph Murphy and Brian O’Dwyer.

Murphy is a former Massachusetts Commissioner of Insurance. O’Dwyer is senior partner at the law firm O’Dwyer & Bernstein in New York and has more than 40 years of experience in labor relations.