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Leadership

Meet our executive team.

NSM is led by a team of respected industry veterans who have built the organization into a global leader in specialty insurance. Fueled by an entrepreneurial spirit and an uncompromising focus on building success for agents, partners and team members, they are leading the way in redefining what’s possible when it comes to best-in-class insurance.

Geof
McKernan

Chief Executive Officer

Bill
McKernan

President

Marc
Castellucci

Chief Operating Officer

Jonathan
Costello

Chief Financial Officer