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

Featured News
Jan 5, 2021
Colliers Facilitates Sale and Prepares Leasing Strategy for Myles Standish Industrial Gem
Leading global commercial real estate services firm Colliers International recently advised the former owner of 50 John Hancock Road, Eagle Drive, LLC, in the sale of its 151,306-square-foot Taunton facility to VMD Companies.
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Sep 17, 2020
Colliers Continues Growth in Boston With Addition of Veteran Cushman & Wakefield Advisor, Kevin Hanna
Leading global commercial real estate services firm Colliers International announced today it has hired veteran real estate professional Kevin Hanna as Executive Vice President in its Boston office.
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Aug 31, 2020
Colliers Advises U.S. Cabinet Depot in 209,643-SF Office and Warehouse Lease in Norton
Leading global commercial real estate services firm Colliers International has recently advised national cabinet company, U.S. Cabinet Depot, in a 209,643-square-foot lease at 176 S. Washington Street in Norton, Massachusetts.
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Aug 3, 2020
Colliers' Southwest Team Continues Leasing and Sales Momentum in Boston's Suburbs
In a wide array of recent transactions taking place in the midst of the COVID-19 pandemic, Colliers International's Southwest suburban team has displayed incredible resiliency in its pursuit of continuing to operate business as usual.
Read More
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