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SCHEDULED MAINTENANCE: Online & Mobile Banking will be unavailable on Sunday, March 26, between 12:00am–6:00am due to routine system maintenance. Should you need access to your accounts, please arrange to submit transactions before or after this scheduled maintenance, visit your local MountainOne branch or call our Customer Care Team during normal business hours at 855.444.6861.
IMPORTANT UPDATE: As a DIF Member Bank, all deposits with MountainOne are fully insured in excess of existing FDIC coverage. Learn more.

Jonathan Denmark

Jonathan Denmark

LIA, CLTC, CISR, CLCS

President & Chief Operating Officer, Insurance Division

  • 413.663.2276

Jonathan joined MountainOne Insurance in 2015 as President & Chief Operating Officer. He has over 15 years of experience working with individuals and businesses to manage their insurance portfolios. Jonathan is a Licensed Insurance Advisor (LIA), Commercial Insurance Service Representative (CISR) and Certified in Long Term Care (CLTC). He obtained his Master’s Degree in Business Administration (MBA) from the University of Massachusetts, Isenberg School of Management. In the community, Jonathan serves as Vice President for Congregation Knesset Israel and Board Member for 1Berkshire and the Pittsfield Economic Development Authority (PEDA). He is a member of the MBA Advisory Board for the Massachusetts College of Liberal Arts.

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