Mission-Critical HVAC Engineer – TS/SCI Clearance Preferred

Leidos; Springfield (VA); On-site; USD 87,000 - 157,000; Full time

Job summary

Leidos is seeking a driven Facilities Mechanical Engineer to design and analyze HVAC systems for secure mission-critical facilities, ensuring energy efficiency and code compliance for 24/7 operations.

You will collaborate with multidisciplinary teams, prepare drawings in AutoCAD/Revit, run load and energy models, and participate in field surveys and commissioning to deliver reliable indoor environments.

Qualifications

• Bachelor’s degree in Mechanical Engineering

Responsibilities

• Analyze the design and layout of HVAC systems 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 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 submittals, 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.

Job description

Leidos is seeking a driven Facilities Mechanical Engineer to design and analyze HVAC systems for secure mission-critical facilities, ensuring energy efficiency and code compliance for 24/7 operations.

You will collaborate with multidisciplinary teams, prepare drawings in AutoCAD/Revit, run load and energy models, and participate in field surveys and commissioning to deliver reliable indoor environments.