QUALITY BUILDS.
PLANS EXECUTED.

CONSTRUCTION & MECHANICAL SYSTEMS

We help clients deliver safe, compliant, and schedule-aligned outcomes across construction, mechanical, and service projects.

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DECADES OF COMBINED TRADE AND PROJECT EXPERIENCE.

Most teams don’t need another vendor; they need a delivery partner that protects schedule, quality, and cost. NAG. provides certified multi-trade capability across construction, mechanical, and MEP, backed by disciplined project oversight… scope control, field coordination, and inspection-ready execution. We help primes and owners reduce rework, prevent delays, and deliver compliant outcomes with confidence.

Two workers wearing yellow hard hats, safety vests, and work uniforms inspect industrial piping system in a factory or plant.

Two construction workers wearing yellow vests and hard hats look at a scaffolded building under construction.

A worker wearing a yellow safety helmet and high-visibility jacket inspecting red industrial pipes in a mechanical room.

What We Do

We plan the work, manage the planning, and field operations so projects stay on schedule, pass inspection, and perform.

Mechanical & HVAC Systems

NAG installs, services, and upgrades HVAC and mechanical systems to keep your building comfortable, efficient, and dependable. From troubleshooting and repairs to replacements and retrofits, we focus on performance you can feel—less downtime, fewer surprises, and systems that run the way they should year-round.

Preventive Maintenance

Move from reactive fixes to a proactive maintenance plan that reduces downtime and extends asset life. NAG builds structured preventive maintenance routines for key building systems—so you catch problems earlier, reduce emergency calls, and keep operations steady.

Commercial Construction (New Builds & Renovations)

From tenant improvements and interior buildouts to facility renovations and upgrades, NAG Construction & Mechanical Systems delivers clean, well-managed builds that protect your schedule, budget, and operations. We manage scope, trades, and day-to-day execution so work stays organized, issues get resolved quickly, and you get a finished space you can rely on.

Capital Project Management (Onsite and Offsite Oversight)

When schedule, quality, and cost control are non-negotiable, NAG provides hands-on project management and field oversight to keep work moving. We coordinate trades, track milestones, manage changes, and surface issues early—so you avoid delays, reduce rework, and maintain control from kickoff through closeout.

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Plumbing, Gas & Electrical

Keep critical building systems safe, code-compliant, and ready for real use. NAG provides plumbing, gas, and electrical work—from installations and upgrades to repairs and compliance support—so your facility stays operational, inspections go smoothly, and your team isn’t stuck dealing with preventable shutdowns.

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Core Service Capabilities

- HVAC & Refrigeration
- Hydronic Systems
- Backflow Testing & Certification
- Facility Maintenance & Service Programs
- Plumbing & Gas Installation
- Electrical Services & Lighting
- Master-level code compliance and commissioning
- Renovations & Interior Improvements
- Carpentry & Structural Framing
- Site Execution & Field Project Management
- Electrical & HVAC Components and Equipment
- Plumbing Materials & Equipment
- Construction Supplies and Consumables