Senior Mechanical Engineer

Data Center Mechanical EngineerApex Systems is seeking an experienced Data Center Mechanical Engineer to support the design, construction, commissioning, and operational readiness of large-scale data center facilities. This role will serve as a key technical resource, ensuring mechanical systems are designed, installed, and commissioned to meet performance, reliability, and operational requirements.The ideal candidate thrives in fast-paced construction environments, enjoys solving complex infrastructure challenges, and has experience working across multidisciplinary teams supporting mission-critical facilities. This position requires a hands-on engineering professional capable of resolving field-level issues, collaborating with multiple stakeholders, and ensuring that HVAC and mechanical infrastructure systems are delivered safely, efficiently, and in compliance with applicable standards and project requirements.Minimum Qualifications:Bachelor's degree in Mechanical Engineering, Industrial Engineering, or a related technical discipline, or equivalent practical experience.5+ years of experience in the design, construction, and commissioning of one or more of the following systems: chilled water systems, air handling and HVAC systems, fire suppression systems, plumbing systems, or underground wet and dry utility systems.5+ years of experience supporting electro-mechanical assemblies and mechanical testing activities, including troubleshooting, issue resolution, and technical documentation.5+ years of experience supporting mission-critical facilities and associated mechanical infrastructure.5+ years of experience working with data center operations teams, mechanical contractors, vendors, and cross-functional project stakeholders.Preferred Qualifications:Master's degree in Engineering, Business, or a related field.Professional Engineer (PE) license.Experience designing modular building-scale assemblies and systems.Strong understanding of mechanical engineering and design principles related to medium-scale manufacturing and production environments, structural systems and building components, and international building codes and standards.Experience supporting hyperscale data centers, semiconductor facilities, industrial manufacturing operations, or other mission-critical environments.Key Responsibilities:Provide technical support to data center operations, construction, and facilities teams throughout the project lifecycle.Define and validate mechanical system design requirements for multiple data center projects from concept through completion.Support infrastructure upgrades, expansions, and renovation projects.Collaborate with engineering, design, construction, and commissioning teams to develop and implement data center mechanical designs.Respond to Requests for Information (RFIs) and technical inquiries during project execution.Manage field-level engineering issues and coordinate resolutions with internal stakeholders, engineering partners, and contractors.Lead investigation and resolution of mechanical system deficiencies and design conflicts.Participate in the deployment of new technologies and cooling solutions within data center environments.Serve as the primary mechanical engineering resource for site-level project execution activities.Support commissioning and startup activities for mechanical infrastructure systems.