Sean Hannigan | Colliers International | Boston

Sean Hannigan

Assistant Vice President

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Professional Summary

As a broker with the Southwest team at Colliers, I represent a variety of landlords and tenants across all product types, including office, industrial and flex. My clients range from national corporations to small business owners, all of whom rely on me for market knowledge as well as my level headedness, creativity and determination.

Prior to joining Colliers in 2018, I spent my first two years out of college as a member of the leasing and advisory team at NAI Hunneman. This experience, coupled with my Economics and Finance degree from Bentley University, allowed me to develop a strong foundation in the many different facets of commercial real estate.

One of my favorite parts of my job is seeing my clients grow and succeed. Knowing that I play a vital role in deciding where a company calls “home” is extremely rewarding.  

When I am not helping clients with their commercial real estate needs, I enjoy golf, going to concerts and spending time in Maine.


Rookie of The Year Award Recipient in 2016 at NAI Hunneman


  • Brokerage: Landlord Representation

  • Brokerage: Tenant Representation

    Property Type:

  • Office

  • Industrial

  • Flex


Bentley University, BS in Economics and Finance

Memberships & Involvements

  • American Ireland Fund
  • Licensed MA Real Estate Salesperson
  • CBA



  • Kaestle Boos Associates, Inc
  • State Electric Corporation
  • Altitude Trampoline Park
  • The Flying Locksmiths


  • KS Partners - Forbers Business Center, Braintree MA
  • Paradigm Properties - 176 South Washington Street, Norton MA
  • Exeter Property Group - 800 John Quincy Adams Road, Taunton MA

My Team

My Team

Featured News
Oct 22, 2019
Colliers Sells Canton Foxford Business Center for 110 per SF
Colliers International recently announced that Senior Vice President Caleb Hudak, Executive Vice President Cathy Minnerly, Vice President Ovar Osvold, Associate Sean Hannigan, and Senior Client Services Specialist Glenne Bachman successfully sold the Foxford Business Center at 960R Turnpike Street, Canton.
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Jul 18, 2019
Colliers sells two Myles Standish Industrial Park assets for near 130/SF
Colliers International recently announced that Executive Vice President Cathy Minnerly, Senior Vice President Caleb Hudak, Vice President Ovar Osvold, and Associate Sean Hannigan successfully advised their client, Rock Partners, LLC, in the portfolio sale of 520 and 540 Myles Standish Boulevard in Taunton, Massachusetts.
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