Our Story
Tetra Mechanical Services LLC was built on the backbone of Local 638 steamfitting expertise and a deep understanding of New York City’s most demanding mechanical environments. Founded by Robert Covelli and Joseph Demasi, both seasoned Steamfitters with nearly two decades of field and leadership experience, the company emerged from years spent managing large-scale HVAC, piping, and fire suppression projects for major institutions like NYU, Con Edison, and the Port Authority. Their hands-on leadership style and union workforce knowledge shaped Tetra into a firm grounded in safety, precision, and schedule-driven performance.
From complex campus boiler replacements to critical-path infrastructure upgrades, Tetra has consistently delivered under pressure. The team has contributed to landmark projects including JFK Terminal 6 and multiple NYU and power generation facilities, coordinating major mechanical systems while maintaining uninterrupted operations. Their ability to manage union crews, meet strict deadlines, and uphold uncompromising quality standards has earned them a reputation for reliability across the metropolitan New York area.
Supporting this field strength is Tetra’s integrated in-house capability—BIM coordination, 3D modeling, AutoCAD and SprinkCAD drafting, spool sheet production, fabrication, and hydraulic calculations—all working in sync from preconstruction through installation. Backed by strong bonding capacity, comprehensive insurance coverage, and strategic industry partnerships, Tetra Mechanical stands positioned to take on large-scale, schedule-sensitive projects while delivering value, compliance, and excellence at every stage.
Our Mission
Tetra Mechanical Services LLC is committed to delivering high-performance mechanical and fire protection systems with precision, safety, and integrity. Built on Local 638 field leadership and real-world experience, we execute complex, schedule-driven projects with disciplined coordination, union craftsmanship, and uncompromising quality standards. We operate on field-level truths—ensuring every system we install performs reliably, efficiently, and in full alignment with our clients’ expectations.
Our Values
Precision mechanical construction supported by union expertise, regulatory compliance, and coordinated project execution.
Field-Driven Leadership
As a steamfitter-owned and operated firm, we believe effective leadership begins in the field. Our decisions are grounded in hands-on experience, practical constructability, and respect for the skilled union workforce that powers every project.
Precision & Accountability
From BIM coordination and in-house fabrication to QA/QC, document control, and risk mitigation, we approach every phase with structure and discipline. We take ownership of outcomes, maintaining traceability, safety compliance, and strict schedule adherence.
Partnership & Performance
We value strong relationships—with clients, union labor, suppliers, and MWBE partners. Through collaboration, financial strength, and proven project delivery systems, we confidently support large-scale, bondable work while protecting our clients’ timelines, budgets, and operational continuity.
Safety & Regulatory Compliance
Tetra Mechanical Services LLC – NYC Field Operations
Regulatory Compliance & Authority Structure
Tetra Mechanical Services LLC operates under a strict safety governance framework aligned with Federal OSHA regulations, New York State labor laws, NYC Department of Buildings requirements, and NYC Site Safety Training (SST) mandates. When multiple standards apply, the most stringent requirement governs. In addition to regulatory compliance, Tetra formally adopts the MCAA Safety Manual for Mechanical Construction Workers as the minimum standard for mechanical construction practices. Project-specific General Contractor safety plans are integrated into our operations to ensure seamless coordination and full site compliance across New York City and Long Island.
Field Safety Programs & Core Controls
Safety is embedded into every phase of field operations. Our program includes comprehensive hazard identification and control systems covering personal protective equipment enforcement, hazard communication and chemical safety management, fall prevention, lockout/tagout energy control procedures, electrical safe work practices, confined space authorization, excavation and trench protection, hot work permitting and fire watch coordination, and material handling and rigging controls. All field personnel are properly credentialed, trained, and authorized before performing regulated tasks. Work does not proceed unless required safeguards are verified and in place.
Training, Accountability & Continuous Improvement
Tetra Mechanical Services LLC maintains mandatory training requirements for all field personnel, including OSHA 10 or OSHA 30 certification, NYC SST credentials, and task-specific instruction for high-risk activities. Regular toolbox talks and site-specific safety briefings reinforce hazard awareness and procedural compliance. Every employee is granted stop-work authority without retaliation and is required to report unsafe conditions, injuries, or near-misses immediately. Safety performance is actively monitored through incident review, documentation controls, and annual program evaluations. Production schedules and cost considerations never override safe work practices.