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About Us

Founded in Texas, External Technical Services is a full- service construction firm that collaborates with designers and architects  to create spaces with form and function suited to your home or work space.  ETS is a detail oriented, creative, one-stop-shop for exterior masonry, carpentry, framing, aggregate, irrigation, and landscaping driven by a passion for creating spaces that spark curiosity and help clients create environments for healthier lifestyles.

The firm provides 2D and 3D construction designs, site plans, elevations, and material lists through its collaborators. It provides in-house and subcontracting construction services through its staff and and network of reputable technicians.

Cullen Quinn
Managing Principal

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Cullen comes from four generations of Texans and has worked around agriculture and construction since age 5 driving his great uncle's ranch pickup. He designed and remodeled his church's landscape 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 mergers and acquisitions and built relationship development, financing and technical skills for running a general contracting company.  He founded ETS at 25 to provide masterplanning, project management, and construction services to residential and commercial clients in Texas. Cullen is a religious gym member and a poor hunter.



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