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