Jack Callahan | Colliers International | Parsippany

Jack Callahan

Associate Director

License # 1432283

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Professional Summary

Jack Callahan is an experienced commercial real estate professional mainly focused on tenant & landlord representation in the New Jersey market but has also completed transactions on a multinational basis.  Areas of expertise include acquisitions/dispositions, lease negotiation/renewals, site selection, cost/value analysis, transportation analysis, amongst others.  Since joining Colliers International is 2014, Jack has already conducted over 1 million square feet of transactions for both industrial and office users in his young career.  He also has a focus in the Life Sciences/Technology industry where he's worked with various life science/tech startups assisting them in managing future growth forecasts, lease analysis, site selection, and implementing flexible lease strategies for his clients to achieve their long term business goals.  

Mr. Callahan was recently promoted to Associate Director in 2016 and is an active member in local chambers, BioNJ, NJTC, and various community platforms. 



New Jersey License

Ambassador of New Jersey Technology Council (NJTC)

BioNJ Sponsor & Member

Morris County Chamber of Commerce


Graduate from Rutgers University with a degree in Economics and minor in Human Resource Management.   

Memberships & Involvements

NJTC, BioNJ, Morris County Economic Development Group, Morris County Chamber of Commerce


PMV Pharma, CorMedix, Central Medical Supply, Epstein Ostrove LLC, Sugarfina, Duff & Phelps, HPG Group, Sodick Inc., Radius Health, Nice Systems


Life Sciences, Asset Management, Metro Leasing, Mixed-Use Properties
Service Lines
Tenant Representation, Landlord Representation
Property Type
Office, Industrial
Life Sciences Group
Featured News
Jun 25, 2018
Colliers Announces 19,000 SF of Leasing Activity at Florham Park Corporate Center
Demand Momentum Coincides with Amenity-focused Capital Improvement Program
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Nov 1, 2017
Duff & Phelps, LLC renews 33,000-SF office lease in Morristown, N.J.
Colliers and JLM Partners worked together to represent Duff & Phelps in a 33,000-SF renewal in Morristown, NJ.
Read More
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