Architectural Systems Contractor for Complex Construction
GAC partners with general contractors, developers, architects, and design teams to deliver coordinated glazing, façades, metals, railings, and specialty systems.
Integrated Expertise From Preconstruction Through Closeout
Built on more than 25 years of glazing expertise, GAC has evolved into a broader architectural systems platform integrating glazing, façades, architectural metals, railings, and specialty applications under one experienced project team.
As an architectural systems contractor, we work at the intersection of architectural design, building-envelope performance, manufacturing, engineering, procurement, and field execution. That broader view helps project teams identify risks earlier, reduce scope gaps, improve constructability, and create stronger accountability before material reaches the jobsite.
GAC is structured for builders who need more than a product source. We support the decisions that affect budget, schedule, system performance, logistics, installation, and closeout.
Built Around Project Risk
Budget
Early takeoffs, system evaluation, alternates, and value engineering.
Schedule
Lead-time planning, procurement coordination, logistics, phasing, and sequencing.
Performance
System selection, engineering coordination, product approvals, interfaces, and quality control.
Accountability
Dedicated project leadership from preconstruction through installation and closeout.
One Team. Multiple Architectural Scopes. Coordinated Execution.
Complex architectural packages require coordination across design intent, engineering, manufacturing, procurement, logistics, and field installation. GAC brings those conversations together so glazing, façade, metal, railing, and specialty scopes can be managed as coordinated construction packages rather than isolated products.
Preconstruction First
Takeoffs, budgeting, system comparisons, specification review, constructability, alternates, value engineering, and lead-time analysis before fabrication begins.
Technical Coordination
Shop drawings, engineering requirements, product approvals, attachment conditions, surrounding construction, and system interfaces coordinated with the project team.
Field Accountability
Schedule-driven procurement, delivery planning, staging, installation coordination, quality-control procedures, punch-list management, and organized closeout.
Built on Experience. Structured for Accountability.
Years of industry experience supporting architectural glazing and related construction scopes.
Licensed general contractor supporting coordinated architectural systems and construction execution.
Preconstruction, design assist, procurement, logistics, installation, quality control, and closeout under one project structure.
A Team Built Around Construction Execution
GAC combines leadership, estimating, client management, project coordination, and field experience to support builders from early opportunity review through project delivery.
Darren Christian
Darren leads GAC with a background that combines corporate discipline and construction experience. A University of Illinois graduate with a BS in Economics, he began his career with Hershey Chocolate USA before moving into construction in downtown Chicago.
Since relocating to Florida, Darren has helped shape GAC into a commercial architectural systems partner focused on glazing, façades, architectural metals, railings, and coordinated project execution.
Alejandro Vargas
Alejandro brings more than 30 years of commercial and residential construction experience, including window, door, and curtain wall installation on large-scale developments.
He works with architects, general contractors, and developers to support system selection, field coordination, safety, schedule, and quality across complex projects.
Aline Frota
Aline brings a background in entrepreneurship, sales, and client service. Fluent in English, Portuguese, and Spanish, she supports commercial developers, general contractors, and architects with responsive communication and disciplined follow-through.
Paula Bennett
Paula focuses on strategic client relationships, solution-based sales, and clear coordination. Her approach emphasizes responsiveness, professionalism, and understanding each project team’s objectives before the opportunity moves forward.
Marcus Rivera
Marcus brings more than 15 years supporting developers and contractors on glazing and building-envelope work. His background includes estimating, product sourcing, contract management, and commercial project coordination.
Estimating, Operations, and Project Coordination
Sofia Delgado
Sofia supports operations, administration, client communication, and internal workflow across the organization.
Camila Restrepo
Camila supports commercial bid preparation, material takeoffs, pricing, and estimating coordination for complex project opportunities.
Lucía Torres
Lucía supports detailed takeoffs, pricing, and proposal development with a focus on technical accuracy and clear project documentation.
Carlos Mendoza
Carlos brings more than 20 years of commercial construction and glazing experience supporting schedules, permitting, installation, and closeout.
Mateo Rivera
Mateo brings hands-on construction and glass installation experience with a focus on field coordination, schedule, quality, and closeout.
Connected to the Construction Community
GAC participates in industry organizations that connect contractors, construction executives, and project leaders around professional standards, advocacy, education, and the continued development of the construction industry.
Deliver Coordinated Systems With Discipline
GAC delivers architectural glazing, façades, metals, railings, and specialty systems with a focus on constructability, performance, schedule, quality, and accountability. We work with builders and design teams to bring complex architectural scopes from early planning through final completion.
Be the Contractor Project Teams Call Early
Our goal is to be a trusted architectural systems contractor for demanding commercial and luxury construction, known for technical coordination, strong manufacturer relationships, disciplined project delivery, and value created before material is ordered.
Planning a Complex Architectural Package
Send GAC the plans, specifications, project stage, and anticipated scope. Our team can review the opportunity, identify the relevant systems, and determine the appropriate next step for preconstruction or bid review.