Facilities Mechanical Engineer

Leidos•Springfield, VA

23h•$87,100 - $157,450•Onsite

About The Position

Leidos is seeking a driven and detail-oriented Facilities Mechanical Engineer to support the planning, design, and analysis of mechanical systems—primarily Heating, Ventilation, and Air Conditioning (HVAC)—for secure, mission-critical operations. This is a growth-focused role where you’ll work alongside senior engineers to develop high-performance, energy-efficient, and code-compliant systems that support 24/7 operations. You will be expected to provide engineering level support for existing systems and work with other disciplines to resolve site issues. This role supports a TS/SCI with Polygraph, and Leidos can maintain that clearance for the position.

Requirements

Ability to obtain a Top Secret/SCI with Polygraph clearance
Bachelor’s degree in Mechanical Engineering
4+ years of relevant experience
Understanding of design specifications and documentation standards
Experience with facilities HVAC equipment design, management, and support
Strong communication skills and ability to work across multidisciplinary teams
Excellent organizational skills and attention to detail

Nice To Haves

Any level of active clearance.
Active Top Secret/SCI with Polygraph.
Mechanical Fundamentals of Engineering (FE) exam or Professional Engineers (PE) exam passed
Experience with Siemens Insight, Siemens Desigo, Tridium, or Iginition
Proficiency in CAD software (e.g. AutoCad, Revit)
Ability to contribute independently to moderately complex engineering projects
Ability to apply engineering standards and best practices in documentation and design

Responsibilities

Analyze the design and layout of HVAC systems, including ductwork, piping, ventilation, and equipment selection for high-availability environments.
Collaborate with electrical, architectural, and structural teams to deliver integrated solutions.
Prepare and maintain construction drawings and specifications using AutoCAD, Revit MEP, or similar tools.
Support system load calculations, energy modeling, and equipment sizing using tools like Trace 700, HAP, or eQUEST.
Participate in field surveys, site investigations, and facility condition assessments.
Perform commissioning, testing, and balancing to ensure optimal system performance.
Review submittments, respond to RFIs, and support construction administration activities.
Ensure all designs meet applicable codes and standards (ASHRAE, NFPA, IBC, IMC, LEED).
Maintain organized documentation including technical memos, reports, and as-built drawings.
Manage Building Management Systems (BMS) for centralized control of HVAC, lighting, and life safety systems.