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The People Behind the Red Square

Meet the Specialists dedicated to your comfort and our community.

Want to join a team that values heart over quotas?

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Mark Downing - Founder / Service Specialist

LICENSES: MASTER PLUMBER, GAS SERVICE

Mark started GSMS in 1987 with a single van and a commitment to doing things the right way. While he has transitioned the company to the second generation, Mark’s passion for the trade keeps him in the field every day. You’ll still find him visiting clients, sharing his 39 years of expertise, and ensuring the Downing standard is met on every call.

Cheryl Downing - Financial Controller

Cheryl’s story with GSMS began 38 years ago when she was drawn into the industry by her then-future husband, Mark. Today, she’s helped build not just a business, but a family legacy. Working side-by-side with Mark and their two sons, Zak and Jack, is her greatest reward. A highly intuitive person, Cheryl lives by her guiding philosophy: “Thoughts become things, and everything happens for a reason.” Outside the office, Cheryl serves as a Board Member and Treasurer for the Swains Lake Association, helping protect the waters where she and Mark raised their family. In her free time, you’ll find her traveling the world, designing beautiful spaces, floating on the lake, or behind the camera. But her absolute favorite thing is spending time with family and friends—hosting get-togethers with good food, great wine, and uplifting music.

Zak Downing - Owner, Second-Generation

LICENSES: GAS SERVICE

Zak grew up in the trade, holding the flashlight for his father since he was five years old. Today, as Owner, Zak leads the day-to-day operations and the vision for the 'Red Square Finish.' He remains hands-on with our clients, personally designing custom comfort systems to ensure every home gets the perfect solution.

Jack Downing - Senior Service Specialist

LICENSES: GAS SERVICE

Having grown up in the family business, Jack officially entered the trades and joined the GSMS team seven years ago because it simply felt like the perfect fit. Guided by the Golden Rule, Jack appreciates the genuine kindness of both his colleagues and his clients, and he wants every customer to know that the team will always try to do their absolute best on every job. A natural learner who loves to master new skills, Jack stays incredibly active outside of work. You can usually find him renovating his first house, woodworking, playing the guitar and drums, or experimenting with new recipes on the grill and smoker. Depending on the season, he also loves skiing or cycling. Above all, he cherishes the time he spends with his fiancé, Hope, and their Australian Shepherd, Norman. Jack is also a proud member of the Pointer Fish & Game Club.

Adam Phelps - Installation Manager

LICENSES: JOURNEYMEN PLUMBER, GAS SERVICE

With 32 years in the HVAC industry and 30 of those at GSMS, Adam brings a wealth of experience and a commitment to excellence to his role as Director of Installation. Drawn to the trades by the diverse opportunities it offers, Adam ensures that every installation is done with future service in mind, making it easier for our technicians down the road. In his free time, Adam enjoys relaxing, watching movies, and spending time outdoors. Guided by the motto “keep on truckin’,” Adam values the good people he works with at GSMS and is proud of the high standards his team maintains in every project.

Quinn Stackpole - Installation Specialist

LICENSES: GAS APPRENTICE

Quinn is a dedicated Installation Specialist who’s been making a difference at GSMS for almost 5 years. Drawn to the trades by his hands-on nature and love for working outdoors, Quinn brings energy and enthusiasm to every job. His commitment to excellence is guided by his motto: “always give 110% from the beginning of the day to the end of the day.”

When he’s not at work, you’ll find Quinn hitting the gym or enjoying a peaceful day of fishing. He values the supportive environment at GSMS, where great people are always willing to help him learn and grow. Quinn’s goal is to ensure that every client experiences top-notch service, as he and his team strive to be the best, well-prepared, and professional.

Gina Zafirakis - Client Experience Specialist

Gina may be relatively new to the HVAC world, but her enthusiasm and commitment shine through every day at GSMS. With a background in beauty and medical fields, she found her way to HVAC and has been a vital part of our team for 3 years. Gina’s role as a Client Experience Specialist is driven by her passion for providing honest, reliable service and embodying the core values of GSMS.

Outside of work, Gina loves spending time with her family, friends, and her beloved cat and bunny. She’s also a dedicated volunteer at the local animal shelter and finds joy in crafting beautiful wreaths. As the world’s biggest Britney Spears fan, Gina’s positive energy and fun-loving spirit contribute to the supportive, family-oriented culture at GSMS. She’s thrilled to be part of a team that values integrity and care as much as she does.

Qwentin Gauvin - Service Specialist

Qwentin is a dedicated Service Specialist with 3 years in the HVAC industry and a year at GSMS. His hands-on background, honed through working on dirt bikes, drives his enthusiasm for tackling technical challenges and delivering exceptional service. Outside of work, Qwentin stays active by going to the gym and riding dirt bikes.

Qwentin values the supportive and collaborative environment at GSMS, which he considers the best workplace he’s ever experienced. Known for his light-hearted, fun-loving nature, Qwentin is committed to providing high-quality work and treating each client with the care and respect they deserve.

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