Senior Mechanical Engineer, Mission Critical

Senior Mechanical Engineer, Mission Critical

Apply for the Senior Mechanical Engineer, Mission Critical role at EXP in Jacksonville, FL. EXP is a globally connected, employee‑owned company that delivers innovative solutions for built and natural environments. Our multidisciplinary teams include engineers, architects, designers, scientists, and creators who collaborate to solve complex challenges and advance sustainable outcomes.

• CAD proficient with working CAD drawings.
• Prepare and review calculations for loads.
• Thorough knowledge of codes.
• Edit specifications to reflect project requirements.
• Develop equipment room sizes during SD and DD phases.
• Select and schedule equipment.
• Meet with vendors to determine specification requirements.
• Coordinate with other disciplines (MEP/FP, Architecture, Structural, etc.).
• Respond to RFIs and review submittals accurately.
• Resolve installation problems.
• Apply risk management procedures daily to minimize exposure.
• Plan work and manage the design process within allocated hours.
• Define proper scope for SD, DD, and CD level documents.
• Collaborate with PC, PM, and Clients to meet project milestones.
• Manage and deliver revisions (ASI’s, sketches, etc.) with proper numbering conventions.
• Edit and develop scope of work narratives (SD, basis of design, etc.).
• Understand specific engineering requirements for application within a market sector.
• Provide existing experience details relevant to projects.
• Mentor designer‑level staff and guide their responsibilities.
• Maintain responsible charge meeting design and quality levels.
• Conduct QA/QC reviews of all calculations and provide guidance.
• Define content of drawings and specs for designers to meet scope.
• Develop and monitor work plans in conjunction with PMs.
• Ensure code compliance in designs.
• Deliver on budgeted hours across multiple projects.
• Write studies and reports for HVAC systems.
• Document sequences of operations for AHUs, CHWs, and HW systems.
• Apply concepts of CHW, HW, WSHP, variable & constant flow systems.
• Select air-side and hydronic components (CV, VAV, coils, fans, boilers, chillers, towers, etc.).
• Apply psychometrics and climate‑specific design.
• Analyze advanced equipment (DX, heat pumps, filters, etc.).
• Assess humid climate design risks and energy concepts.

• 7+ years in project management/mechanical design.
• PE License.
• Professional engineering license and a degree in engineering.
• Strong leadership and communication skills.
• Preferred experience in data center, mission critical, or telecom industry.
• Building design experience is mandatory.

EXP is proud to be an Equal Opportunity Employer. We fully and actively support equal access for all people regardless of Race, Color, Sex, Religion, Gender, Age, National Origin, Veteran Status, Disability, Genetic Information, or Sexual Orientation. Should you need accommodations, contact  for suitable arrangements.

Jacksonville, FL