Senior Mechanical Design Engineer – Mission Critical Design – Northern Virginia / Baltimore

MXI Partners is searching for a Senior Mechanical Design Engineer to join a leading data center and mission-critical engineering & construction contractor in Northern Virginia or Baltimore. This role will lead complex mechanical design projects across hyperscale data centers, life sciences, healthcare, and mission-critical facilities, owning projects from concept through completion while serving as a key technical authority for clients and project teams.

What's On Offer

$130k – $180k base salary + 10–20% bonus + full benefits
Salaried role with paid hourly overtime for all hours worked over 40 per week
Hybrid-flexible working model (less than 3 days in office) with Northern Virginia or Baltimore office options
Work on high-impact hyperscale and mission-critical mechanical design projects
Leadership role with ownership of HVAC and mechanical system design
Flexible work schedule and strong work-life balance
Career growth within a rapidly expanding mission-critical contractor
Profit sharing, 401(k) match, and comprehensive health benefits
Professional development, licensing support, and tuition reimbursement

Key Responsibilities

Lead full lifecycle mechanical design for complex mission-critical projects
Develop HVAC, plumbing, and fire protection systems from concept through completion
Direct multidisciplinary design teams and coordinate across engineering disciplines
Prepare and review mechanical studies, specifications, and cost estimates
Oversee construction drawing sets including ductwork, piping, equipment layouts, and control sequences
Interpret building, fire, and energy codes while working with code officials and design professionals
Coordinate project documentation and ensure timely project delivery
Support load calculations, ventilation analysis, and equipment sizing
Partner with clients to translate technical requirements into operational solutions
Drive quality, compliance, and technical excellence across projects

Minimum Qualifications

Bachelor’s degree in Mechanical or related Engineering field
4+ years of mechanical engineering and design experience
Experience designing systems for data centers, healthcare, labs, industrial, or commercial facilities
Strong experience with HVAC, plumbing, and fire protection construction drawings
Working knowledge of building codes, energy codes, and COMcheck
Experience with AutoCAD, Revit, and Microsoft Office tools
Familiarity with load calculation software (Carrier HAP, Trane Trace) preferred
U.S. Citizenship required
PE license preferred

MXI Partners

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