Our Team

John Castellano


Jennifer Castellano

Managing Partner

Anthony Wincko

Vice President

Matt Johnson


Kerri Buschmeyer

Bidding and Estimating

Louise Garrity

Bid Coordinator

Vinny LaSala

Bidding and Estimating

Project Managers

Shawn Silbaugh

Project Manager

Melanie Jurecko

Project Manager

Jeff Rupert

Project Manager

Assistant Project Managers

Derek Thompson

Assistant Project Manager

Jonah Nordman

Assistant Project Manger

If I am crazy enough to do this again, there will be no hesitation in calling on GGC to do the work for me.
Cathleen MalleryStore Owner, Edible Arrangements
GGC foreman are professional, thorough, no nonsense, and independent. They work wonderfully with tenants and local inspectors.
Lori MoranVice President, Ballymoney Real Estate Services, Inc.
GGC has tackled a wide range of assignments for me, and has approached each of one of them with their own unique brand of enthusiasm and expertise. I often rely on GGC for support on time sensitive matters, and have always been completely satisfied with the outcome.
Terry JackovicDirector of Store Construction/Real Estate, American Eagle Outfitters
Given our experience with GGC as both a recipient of their work through the landlord and as a direct customer, I highly recommend their work and staff. They are definitely on my bid list for our next project in any market they serve.
Kenneth G. TunnelDirector-Real Estate, Performance, Inc.

Clients We Have Worked With