Demo

Senior Mechanical Engineer-Department of Defense

The Building People
Leesburg, VA Full Time
POSTED ON 9/27/2026
AVAILABLE BEFORE 11/27/2026

Please note that this position is for an upcoming position. We are, however, accepting applications for this anticipated need. If you are interested in joining The Building People, we encourage you to APPLY TODAY!

The Building People, LLC, has a position open for a full-time Senior Mechanical Engineer - Department of Defense. The Mechanical Engineer provides design and technical support for facility control system projects, including UMCS, HVAC controls and DDC, SCADA, Fire Alarm Systems, Electronic Security Systems, and metering. Responsibilities include preparing calculations, drawings, specifications, and sequences of operation; coordinating power and controls interfaces; assisting with submittal reviews and RFIs; supporting factory and site testing, integrated system testing, and commissioning; and producing as-built updates and O&M inputs. This role supports a Department of Defense mission and collaborates with senior engineers, project managers, and field teams to deliver code-compliant, reliable systems.


Required Experience & Skills

  • 10 years of experience in Electrical and/or Mechanical engineering, including at least five (5) years in the functional area aligned to this work.
  • Active U.S. Professional Engineer (PE) license in Electrical or Mechanical engineering (required).
  • Demonstrated experience producing engineered designs and specifications for UMCS, HVAC controls and DDC, SCADA, FAS, ESS, and metering.
  • Proficiency developing design documentation: load and capacity calculations, one-line diagrams, panel schedules, wiring and control diagrams, hydronic and airside schematics, sequences of operation, point lists, and equipment schedules.
  • Experience planning and witnessing factory tests, site tests, integrated system tests, and final acceptance; coordinating deficiency resolution and as-built updates.
  • Working knowledge of applicable criteria and codes, including UFGS, UFC, NFPA 70 and 72, NFPA 101, ASHRAE 55/62.1/90.1, IMC, IBC, and relevant industry standards.
  • Familiarity with ICS cybersecurity touchpoints that influence design (for example: network segmentation, PPS allowlisting, secure configurations) in coordination with cybersecurity teams.
  • Construction administration experience, including submittal reviews, change support, field surveys, and punchlist closeout.
  • Strong written and verbal communication skills for coordination with stakeholders and preparation of technical deliverables.
  • Ability to travel to active project sites, including secure facilities.

Preferred Experience & Skills

  • Prior experience on federal task order contracts for facility modernization or control systems programs.
  • For Electrical: short-circuit, coordination, and arc-flash studies and NFPA 70E compliance; grounding and bonding; standby power and UPS integration; lighting and controls.
  • For Mechanical: HVAC load analysis, equipment selection, chiller and boiler plants, hydronic and airside design, and controls integration with sequences of operation.
  • Commissioning credentials (CxA or similar) or energy-related credentials (CEM, CBCP).
  • Proficiency with design and analysis tools such as Revit, AutoCAD, SKM or ETAP, TRACE or HAP.
  • Experience integrating legacy systems with new DDC and enterprise monitoring platforms.

Required Education

  • Bachelor's degree in engineering (electrical or mechanical) from an accredited university or college.

Preferred Education

  • Advanced degree in Engineering or related discipline, or an NCEES record to support multi-state licensure.

Clearance

  • Ability to obtain a Secret Clearance.

Travel

  • Minimum 25% to job sites CONUS and OCONUS as required by task orders.

*Salary offered will be commensurate with the candidate's experience, qualifications, and certifications.

*Our positions may require a background screening and clearance directly from the Government.

*Please note that telework arrangements are subject to change based on customer requirements.

ADDITIONAL INFORMATION

Competitive benefits for eligible employees include:

  • Medical & Rx
  • Dental
  • Vision
  • Flexible Spending Accounts
  • 401(k) Retirement Plan
  • Life Insurance/AD&D
  • Long Term Disability and Short-Term Disability
  • Paid Time Off
  • Holiday Pay

All positions require a background check after acceptance of our offer. The selected candidate will be eligible to begin employment before the background check has been finalized. However, continued employment will be contingent upon the results of your reference/background check from The Building People, LLC. Your position may require special credentialing, clearance, and access as a condition of employment. In the event the government or client does not sponsor or approve your clearance, it may result in termination of your employment.

If you need a reasonable accommodation for any part of the employment process, please contact us by email at reasonableaccomodation@thebuildingpeople.com and let us know the nature of your request and your contact information. Requests for accommodation will be considered on a case-by-case basis. Please note that only inquiries concerning a request for reasonable accommodation will be responded to from this e-mail address.

For more information, view the EEO is the Law Poster and Pay Transparency Statement.


We are an Equal Employment/Affirmative Action employer. We do not discriminate in hiring on the basis of sex, gender identity, sexual orientation, race, color, religious creed, national origin, physical or mental disability, protected Veteran status, or any other characteristic protected by federal, state, or local law.


 

Salary.com Estimation for Senior Mechanical Engineer-Department of Defense in Leesburg, VA
$166,563 to $195,569
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