Senior Mechanical Systems Engineer

Location: Dallas, United States; Texas City, United States Location: Remote, U.S. (Dallas-Fort Worth area preferred) Employment Type: Full-Time Travel: Approximately 20% domestic travel required About the Opportunity Join a fast-growing clean-energy technology company developing advanced thermal energy storage solutions for commercial, industrial, and mission-critical facilities. This role will focus on integrating high-impact chilled-water and cooling-plant systems that help improve data center capacity, energy efficiency, resiliency, and grid stability. We are seeking a Senior Mechanical Systems Engineer with strong HVAC, hydronic, and chilled-water expertise to lead mechanical integration projects from design through commissioning across the United States. What You’ll Do Lead the mechanical design and integration of thermal energy storage and chilled-water systems. Develop and review P&IDs, hydronic piping layouts, equipment arrangements, valve schedules, and controls integration interfaces. Perform hydraulic and pipe-stress analyses and support code-compliant engineering documentation. Integrate systems with chillers, cooling towers, heat exchangers, pumps, and BAS/BMS platforms. Collaborate with data center operators, MEP firms, contractors, design engineers, controls integrators, and commissioning teams. Support site surveys, startup, commissioning, and functional testing activities. Provide technical input for presales efforts, proposals, and RFP responses. Create or apply automation tools, such as Python or Excel/VBA, to improve engineering analyses and documentation. Partner with global R&D and product teams to refine system designs and deployment methods. Mentor junior engineers as the engineering team expands. What We’re Looking For Bachelor’s degree in Mechanical Engineering; PE license preferred. 5+ years of experience in HVAC, chilled-water systems, or energy infrastructure. Strong knowledge of hydronic systems, thermodynamics, cooling plants, and BAS/BMS integration. Experience coordinating work across mechanical, controls, and electrical disciplines. Proficiency with AutoCAD, Revit, Plant 3D, or similar design tools. Familiarity with commissioning, startup, and field-execution processes. Ability to travel domestically up to 20% of the time. Requirements Bachelor’s degree in Mechanical Engineering; PE license preferred. 5+ years of experience in HVAC, chilled-water systems, or energy infrastructure. Strong knowledge of hydronic systems, thermodynamics, cooling plants, and BAS/BMS integration. Experience coordinating work across mechanical, controls, and electrical disciplines. Proficiency with AutoCAD, Revit, Plant 3D, or similar design tools. Familiarity with commissioning, startup, and field-execution processes. Ability to travel domestically up to 20% of the time. Preferred Qualifications Experience in data centers or other mission-critical facilities. Exposure to thermal energy storage systems. Familiarity with data-center cooling architectures, including air-side and water-side economization. Experience with industrial refrigeration or low-temperature glycol systems. Knowledge of ASHRAE, ASME B31.3, IPC, NEC, and applicable U.S. building codes. Experience with hydraulic or pipe-stress analysis software, such as Pipe-Flo or AutoPIPE. Familiarity with energy/load modeling tools, including TRACE or HAP. Experience using Python, VBA, Dynamo, or AI tools to automate engineering workflows. Experience preparing technical narratives, proposals, or RFP responses. Background in retrofit projects, operational facilities, or fast-growth environments. Benefits Work on advanced clean-energy infrastructure supporting the fast-growing data center market. Combine hands-on field execution with sophisticated engineering design. Contribute to high-visibility, mission-critical projects with meaningful environmental impact. Build a path toward technical leadership within a growing engineering organization. Receive a competitive compensation package including base salary, bonus potential, benefits, and stock options. Military veterans are encouraged to apply; leadership and field-operations experience are highly valued.