Southern NH's largest Collision Repair Group - Recommended by well over a dozen Major Insurance Companies!

Meet the Managers


Brenton (BJ) Piekarski - Vice President

Brenton (BJ) Piekarski was brought up in Nashua, NH and has been fascinated with cars since he was a little kid. He has been involved with the collision industry his entire life following in the family business. He is constantly striving to achieve to be the best collision repair company in New Hampshire by growing his company, staff, and relationships with his customer and insurance companies. He is also actively involved in a collision industry 20 Group traveling around the country to ensure his shops are actively up to date on the newest industry equipment, training and trends. BJ & his wife Nicole are constantly busy raising their adorable daughter, Aria.


For hobbies, BJ enjoys biking, running and spending active time with him wife and daughter.  His other passion in life has been racing cars since the age of 9 and moved up thru the rank to compete in many New England region tracks, such as Watkins Glen, Lime Rock Park and New Hampshire Motor Speedway. He currently races in the S.C.C.A division around New England and completed the 2016 season with 3 wins.



Jim McCaul - Manager at our Merrimack Office

Jim McCaul has been the manager of our Merrimack office since 2008. He has more than 30 years of experience in the auto body field and in a Managers position combined. Jim started out as a body man and a painter after graduating from Nashoba Valley Technical High School in 1982 with a certificate in auto body. He received his appraisers license in 1989. Jim’s shop is an I-Car gold shop and he is also a member of the Coyote 20 Group. Jim has a love for the field and it shows in the way he treats his customers as well as his employees.


Jim lives in Chelmsford, Massachusetts with his beautiful wife  Linda, and their three lovely daughters, Marissa, Kylie and Madison. He enjoys vacations in Ocean Park, ME and camping with his family.



John L. Sullivan - Manager of Operations for Gate City Collision Centers - Nashua

John L. Sullivan enjoys his position as Manager of Operations for Gate City Collision Centers - Nashua.  He has been employed with the company for five years.

John has over 25 years of experience working in the auto industry in both Massachusetts and New Hampshire.  His love for automobiles ignited when he purchased his first car - a ’69 Chevelle.  He has worked in various positions throughout his career from service technician, auto recondition, service estimator, production manager to his current position.  John knows the value of hard work and providing the best in customer service.


John is I-Car Certified and a member of the 20 Group, a group that helps collision repair centers address business needs and find solutions to key problems.  John lives in Hudson with his wife Kathy and son Shawn.  He loves to travel to warmer climates (especially in the winter) and enjoys “Treasure” hunting with the Granite State Treasure Hunters Club.



Cathy Cassidy - Manager of our Hooksett location

Cathy Cassidy has been an employee of Gate City Collision for 18 years.  Cathy started out as a bookkeeper/receptionist at our main office and worked her way to presently become the manager of our Hooksett location.


Having a background in accounting and working in the automotive industry for many years has enabled her to advance with-in the company. In her free time she enjoys camping with friends and family as well as being a spectator at many of her niece’s sporting and dance competitions.


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