The Staff of Big L Windows and Doors.

Ron Brewster


Ron joins the Big L team having been in the commercial fenestration business for over 18 years, during which time he has specialized in historical renovations requiring SHPO and NPS approvals. A three-time award-winning sales consultant, his knowledge and expertise have helped many architects, general contractors, and building owners navigate their way through this challenging process. Born and raised in the Syracuse area, Ron relocated to the Buffalo area to attend Buffalo State College where he earned a Bachelor of Arts Degree in Public Relations. Ron, his wife Kristin, and their two sons, Ben and Owen reside in the Village of Hamburg.

Chris Mosgeller

716-895-8484 ext. 337

Chris has been in the window and door industry for over 12 years, during which time he specialized in residential replacement sales. A two-time national award-winning sales consultant, his knowledge and expertise are second to none in helping his customers identify the right products and the proper installation in order to turn their visions into reality. Born and raised in Buffalo, Chris is a UB business school graduate. He enjoys spending his free time with his wife and two children.

Xander Iliohan


Xander is a replacement specialist for the Big L Team. He has over 15 years’ experience in the replacement window and doors segment of our business. The primary focus over those years has been sales of residential replacement projects, working with customers from their first consultation about window & doors, to see their visions become a reality. His experience combined with his undergraduate studies in Architecture and Design gives him a great set of tools to help with your window & door replacement projects. When he is not on the job, Xander enjoys spending his time with his wife and two children.

Tom Rauker


Tom has been in the WNY fenestration industry since 1985, winning several local and national sales and customer service awards. He prides himself in offering concierge-style service for your window & door projects, large and small. Tom and his wife reside in the Village of Hamburg and are proud parents of a daughter, studying Graphic Design at the University of Dayton.

Kevin McKenzie


Kevin originally started out as a helper in our warehouse over 15 years ago. Since that time he went on to study at Hilbert College in Hamburg, NY and also earned a graduate degree from The University of Buffalo. Since rejoining the Big L team in 2015, Kevin now works in our sales department. You can typically find Kevin helping a customer pick out a new window or door in the showroom at Big L, but if he’s not here in our showroom he is probably out for a walk on the beach with his wife Kristin and their dog Bella.

James Tronolone


James joined the industry in 2011 and has been with Big L since June of 2015. In 2016, he moved into a full time outside sales consultant role. Born and raised in Buffalo and a graduate of Canisius High School, James is a former college baseball player and an avid sports fan.ege baseball player, having pitched for Niagara County Community College.

Steve Zwolinkiewicz

(716) 362-2459

Steve joined Big L in April of 1981 as an assistant in the warehouse helping to load and unload trucks. Soon thereafter he assumed responsibility for the cash and carry counter where he acquired a great deal of product knowledge and worked with numerous contractors and tradesmen. After a few years, and with the knowledge he had acquired, Steve took an open position in contractor sales and proved to be an excellent resource for Big L’s trade customers. Steve’s 34 years of experience in the business, all with Big L, continues to prove to be of extraordinary value to both Big L and the customers he serves. Steve is a Buffalo native and has been married for 40 years. He has two children and two wonderful grandchildren.

John Ladowski

(716) 362-2449

John started installing storm windows and storm doors when he was 14 years old, and also installed one of the first vinyl replacement windows in Western New York. John is approaching the 35-year mark with Big L. John has expert knowledge of the Marvin family of products which enables him to find the right fit for any size window or door project, whether it’s new construction or remodeling. John is the proud grandfather of 9 beautiful grandchildren.

Travis Connors

(716) 362-2467

Travis joined the Big L team first as an installer, which gives him a great perspective as he inspects and assesses the windows in your home. Extensive knowledge of the installation side of the business enables him to recommend the best type of window or door installation, as well as the best type of product for each situation.

Fritz Cornell

(716) 362-2462

Fritz has been a part of the window industry for over 30 years, as an installer, union glazer and sales consultant. With experience from all aspects of the window and door industry, Fritz will help guide you through the process of choosing, designing and finalizing your project. Fritz is an avid water sports enthusiast, enjoying boating, diving, and fishing during our beautiful Buffalo summers.

Al Hynes

(716) 895-8484

Al worked for Big L as an installer previously and now he has returned to the team after having his own window and door business. Al has years of valuable installation and sales experience in the window and door industry. He is also a City of Buffalo fire fighter and enjoys spending his free time with his wife and three children.