Senior Mechanical Engineer

Location: Houston, Texas (office-based with periodic site visits)
Employment Type: Full-time
Department: Engineering / MEP Mechanical

About Submer

Submer enables sustainable digital infrastructure by providing cutting-edge liquid cooling solutions for data centers. Our technology is designed to reduce environmental impact while improving performance and efficiency. We are a purpose-driven company with a passion for innovation and a growing global presence.

What impact you will have

We are seeking a Senior Mechanical Engineer (MEP) to lead the design, analysis, and optimization of mechanical building systems for mission-critical facilities, including data centers, technical spaces, and high-performance infrastructure projects. You will be responsible for HVAC, hydronic systems, ventilation, piping, and mechanical utilities, ensuring designs meet performance, efficiency, safety, and code requirements.

This role reports to the Director of Engineering and supports both new construction and retrofit projects, from conceptual design through commissioning.

What you'll do

• Lead MEP mechanical system design for HVAC, chilled water systems, air distribution, ventilation, and other mechanical building systems for mission-critical facilities.
• Develop technical specifications, load calculations, mechanical layouts, 3D models, and construction drawings in accordance with project requirements and industry standards.
• Perform thermal load calculations, fluid flow analysis, and equipment sizing (chillers, pumps, CRAHs/CRACs, heat exchangers, piping networks, etc.).
• Ensure designs comply with relevant codes and standards (ASHRAE, IMC, IPC, NFPA, local building codes).
• Collaborate closely with electrical, structural, controls, and architectural teams to integrate mechanical systems into coordinated facility designs.
• Review and support submittals, shop drawings, procurement packages, and equipment selections.
• Oversee field investigations, site surveys, construction support, and commissioning for mechanical systems.
• Troubleshoot and optimize mechanical systems during start-up, testing, and operational phases.
• Mentor junior mechanical engineers, conducting technical reviews and providing guidance on best practices.
• Support continuous improvement of internal design standards, QA/QC procedures, and documentation.
• Assess and evaluate emerging HVAC and mechanical technologies to improve efficiency, sustainability, and resiliency in facility designs.

What you'll need

• Bachelor's degree in Mechanical Engineering or a related field.
• 8+ years of MEP mechanical engineering experience, preferably in data centers, industrial facilities, commercial buildings, or other mission-critical environments.
• Strong knowledge of HVAC design, hydronic systems, air distribution, and mechanical utilities.
• Proficiency in MEP design tools and CAD platforms (AutoCAD, Revit, SolidWorks, or similar) and engineering analysis software (e.g., Trace, HAP, CFD tools).
• Solid understanding of ASHRAE standards, mechanical codes, and MEP best practices.
• Experience with construction administration, field inspections, and commissioning.
• Strong analytical, problem-solving, and communication skills.
• Experience leading small teams or mentoring junior engineers.
• Professional Engineer (P.E license in Texas is a strong plus (or ability to obtain)

Our job titles may span more than one job level. The actual base pay is dependent on a number of factors, such as transferable skills, work experience, business needs and market demands.

What we offer

• Attractive compensation package refleting your expertise and experience.
• Medical Insurance Plan.
• 401k Employee volunteer contribution Plan.
• A great work environment characterised by friendliness, international diversity, flexibility, and a hybrid-friendly approach.
• You´ll be part of a fast-growing scale-up with a mission to make a positive impact, offering an exciting career evolution.

Our Inclusive Responsibility

Submer is committed to creating a diverse and inclusive environment and is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, veteran status, or any other protected category under applicable law.