TSI Companies is building for a more efficient and sustainable future.
Careers at TSI Companies
Our employees are what make TSI Companies strong. We are a growing, full-service interior construction contractor serving builders, developers, and homeowners throughout the region. Through skilled teams, technical expertise, and dependable execution, we help shape better-performing buildings and stronger communities.
Do you want to join our team and be part of the journey?
- New Jersey
- Application deadline: Open Until Filled
- Pennsylvania
- Application deadline: Open Until Filled
- New Jersey
- Application deadline: Open Until Filled
- Pennsylvania
- Application deadline: Open Until Filled
- New Jersey
- Application deadline: 3/15/2026
Sustainability begins with better performing, more energy efficient buildings.
Explore how sustainability guides the way we build.
TSI Companies helps shape buildings that are more energy efficient and better for the environment.
Explore how sustainability guides the way we build
Quality and Craftsmanship
Delivering consistent, high-quality work is at the heart of TSI Companies. Every project is built on skilled teams, proven processes, and attention to detail that builders and developers can depend on.
What we deliver
Our Services
Services
From multi-family developments to commercial and residential interiors, the work we deliver shapes how spaces are built and experienced. Our core services – from insulation and drywall to complete interior systems support projects across New Jersey and expanding markets.
Insulation
Drywall
metal framing
Tile
Drop Ceiling
complete interior systems
Projects
Portfolio
With real-world experience across all phases of construction, we focus on delivering quality work that aligns with our clients’ goals, schedules, and expectations.
- Built for efficiency.
- Built for sustainability.
- Built for performance.
Driven by purpose.
Each project is executed with a strategy built around its specific demands.
Multi-Family Apartments
Hospitality Ilvero Westwood NJ
Wellness - Iron Culture Gym West Orange NJ
Warehouse Spaces - U-Haul Saddle Brook, NJ
Retail - Riverside Square Mall, NJ
Special Needs Home, Landing, NJ
About TSI Companies
Meet Our U.S Leadership
Executive Leadership
Domenico Mariella
Martino Mariella
Juan Osorio
Our Service Areas
Markets - East Region
Geographic Markets
Headquartered in New Jersey, TSI Companies continues its rapid growth across the East Coast, serving key markets in New Jersey, New York, Pennsylvania, and Connecticut.
TSI Corporate Offices
TSI Companies US
- Address: 45 US-46 Suite 604, Pine Brook, NJ 07058
- Phone: (862) 386-8727
- Info@thermalshieldinsulation.com
TSI Electrical Division
- Address 165 Passaic Ave, Suite 244, Fairfield, NJ 07004
- Phone (201) 995-3872
- martino@tsielectrical.com