ABOUT US
Founded in Texas, External Technical Services is a full-service construction firm that designs and builds outdoor spaces suited to your home or work space.
We agree with our clients that we are friendly, creative, and deliver a great product.
Besides delivering unforgettable experiences, the firm provides 2D and 3D construction designs, site plans, elevations, and proposals with products built in house and through our valuable network of reputable technicians.
Marcus grew up in the Hill Country of Texas swinging a hammer beside his father on custom home builds and learning the rhythm of construction from foundation to finish. By age 16, he was managing takeoffs for small residential projects, and by 21, he’d graduated from Texas A&M with a degree in Construction Science and a reputation for precision and grit. After college, Marcus spent four years estimating mid-size commercial jobs for a regional GC, developing a keen eye for value engineering and a steady hand under tight deadlines. He brings a builder’s mindset to every bid and takes pride in helping clients see their vision clearly—from blueprint to bottom line. When he’s not buried in plans, Marcus is fishing at dawn, fixing up his old Chevy, or barbecuing with his family on Sunday afternoons.
And also an Eagle Scout, and all around nice guy.
Cullen comes from four generations of Texans and has worked around his family's agriculture and construction business since age 5 driving his great uncle around in the ranch pickup. He designed and remodeled his church's front yard at 17 for his Eagle Scout, attended UNC-Chapel Hill at age 19, and joined an investment bank at age 22 where he advised building products companies on their most meaningful transactions and developed a interest in helping owners improve their most important assets - the places they live. Cullen is a religious gym goer and an average hunter.
Will was born and raised in Venus, TX, where he spent weekends and summers shadowing his grandfather on job sites and learning how to read blueprints before he could drive. At 18, he built a deck for a neighbor that turned into a small side business, and by 20, he was leading estimating for student housing renovations while earning his degree in Construction Science from Texas A&M. After college, Will joined a fast-growing general contractor where he cut his teeth pricing everything from retail buildouts to ground-up multifamily developments. He has a sharp mind for numbers, a steady hand under pressure, and a deep respect for the trades. Outside of work, Will is a loyal Cowboys fan, a passable bass guitarist, and makes a mean brisket on his backyard smoker.
We specialize in the following services:
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Charming Neighbors
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Clout Development
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Cross-Country Travel
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Charming Tenants
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Supplier Disputes Quelled
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Proposal Organization
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Inspire Subcontractors
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Inspectors Impressed
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Educate Architects
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Immaculate Drawings
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A Little Friendly Competition
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Ultimate Wingmen
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Pickleball Courts
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Walls
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Foundations
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Tennis Courts
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Heavy Equipment Hire
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Ballpark Estimates
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Basketball Courts
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Bureaucracy Slaying
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Peace Brokerage
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Decorative Concrete
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Keeping the Faith
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OSHA Intimidation
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Driveways
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Professional Texting
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Stun Real Estate Developers
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Landscaping
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Property Manager Relief
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Socialite Services
Miracles By Appointment