Senior Field Mechanical Engineer

Senior Field Mechanical Engineer

Overwatch is a service-disabled Veteran-owned small business (SDVOB) certified through the National Veterans Business Development Council (NVBDC), offering construction professional services, talent acquisition, and general contractor services for the mission-critical infrastructure industry. Our mission is the construction and management of state-of-the-art data centers with the precision and reliability this industry demands. From high-end engineers to seasoned professionals, we deploy the people you need to get your data center off the ground.

At Overwatch, it's more than a job — it's purpose.

The Senior Field Mechanical Engineer will serve as the Owner's Representative for the mechanical scope of a large-scale, hyperscale data center construction project. This individual will provide field-based technical leadership throughout design coordination, construction, startup, commissioning, and turnover. The role requires an experienced mechanical engineer who can assess complex field conditions, communicate effectively with design and construction teams, and ensure installations meet the owner's requirements for quality, reliability, maintainability, and operational readiness.

The Senior Field Mechanical Engineer will also mentor junior engineers, helping develop their technical knowledge, field judgment, and ability to manage issues independently.

Field Engineering and Construction Oversight:

• Represent the owner on all mechanical engineering and construction matters.
• Provide field oversight of chilled-water systems, HVAC equipment, CRAH/CRAC units, air-handling systems, cooling towers, pumps, piping, controls, and associated infrastructure.
• Verify installations comply with approved drawings, specifications, owner project requirements, submittals, and applicable codes.
• Conduct regular field walks to assess installation quality, constructability, progress, safety concerns, and commissioning readiness.
• Identify design conflicts, installation deficiencies, and operational risks before they affect the project schedule or system performance.
• Review and support the resolution of RFIs, submittals, field change requests, nonconformance reports, and design clarifications.
• Monitor pressure testing, flushing, cleaning, TAB, equipment startup, and functional testing.
• Track mechanical issues through resolution and verify corrective work has been completed properly.
• Support punch-list development, system turnover, and final acceptance.

Design and Technical Coordination:

• Serve as the primary field liaison between the owner, design engineers, general contractor, mechanical trade partners, commissioning team, controls vendors, and facility operations personnel.
• Communicate field conditions and technical concerns clearly to design teams and recommend practical solutions.
• Participate in design reviews, constructability reviews, coordination meetings, and technical workshops.
• Evaluate proposed design changes for potential effects on reliability, maintainability, cost, schedule, commissioning, and facility operations.
• Ensure design intent is accurately translated into installed mechanical systems.
• Coordinate mechanical requirements with electrical, structural, architectural, controls, fire-protection, and civil disciplines.
• Escalate critical technical and schedule risks to project leadership with clear recommendations and supporting documentation.
• Align construction decisions with the owner's long-term operational and reliability standards.

Commissioning and Turnover:

• Coordinate with commissioning teams to confirm mechanical systems are ready for startup and testing.
• Review pre-functional checklists, test procedures, commissioning scripts, and turnover documentation.
• Support equipment startup, functional performance testing, integrated systems testing, and issue resolution.
• Verify commissioning deficiencies are properly documented, assigned, tracked, and closed.
• Support the turnover of completed systems to facility operations teams.
• Review as-built drawings, operations and maintenance manuals, training records, warranties, and closeout documentation for accuracy and…