Senior Mechanical Engineer

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The Digital Modernization Sector brings together our digital transformation and IT programs, allowing us to better serve our customers through scale and repeatability.

(Group Profile/Link to Group page) - https://www.leidos.com/capabilities/digital-modernization

Your greatest work is ahead!

The NISC IV program at Leidos is seeking a Senior Mechanical Engineer to work in the Federal Aviation Administration (FAA) Regional Office in El Segundo, CA which is in the Los Angeles area.

The Mechanical Engineer will provide engineering support to the FAA Los Angeles Enroute Engineering Center which includes project management and project planning for various Air Route Traffic Control Center construction and upgrade modernization projects.

Specific duties for this position include:

• Provide expertise in all aspects of the complete project management lifecycle.

• Provide Mechanical Engineering Subject Matter expertise (SME) support by overseeing the feasibility, design, planning, and installation of Heating, Ventilation and Air-Conditioning, and Environmental Direct Digital Control Systems.

• Provide Mechanical Engineering SME ) support through dynamic participation in team reviews of design and scope, and assembly of the design package. In addition, provide status reports on site project progress, status reports on schedule updates, participate in Planning and Requirements Group (PRG) matrix meetings, and guide Operational Risk Management and Safety meetings.

• Provide verified heat load calculations including: heating peak, cooling peak, ventilation and process load calculation used for system sizing, and final calculation for energy compliance.

• Analyze and review existing engineering drawings and documents and provide observations on accuracy and completeness, and recommendations for improvement.

• Provide Computer-Aided Drafting and Design (CADD) drawings using AutoCAD and MasterSpec in conformance with FAA standards.

• Provide/evaluate system and equipment design package requirements.

• Assist in preparing Draft project scope agreements and project schedules.

• Prepare engineering risk assessments, and provide recommendations and proposals of actions or improvements to mitigate potential risks resulting from site, facility, and project/program changes.

Please Note:  This will be onsite (El Segundo, CA) with 1-2 days potential for telework with managers approval.

Required Qualifications:

• Bachelor's degree and 4+ years of prior relevant experience OR Master's degree with 2+ years of prior relevant experience. Additional years of relevant experience maybe considered/accepted in lieu of degree.  

• 4 years of applicable mechanical engineering experience including project management and design of building mechanical systems. 

• Experience with ductless split systems, heat recovery systems, residential type split systems, furnace, direct expansion cooling coils, unitary roof top package units, variable air volume systems, air handling units, chillers, boilers, vehicle exhaust systems and other heating, cooling, ventilation, air distribution, pumping, hydronic piping, and indoor air quality systems.

• Performed and verified heat load calculations which include: heating peak, cooling peak, ventilation and process load calculation used for system sizing and final calculation for energy compliance.

• Prepared design development and construction drawings which include: initial schematic, design development and final construction drawings for plan check submittal.

• Ability to obtain a Public Trust Security Clearance Suitability (To be eligible for Public Trust Security Clearance, one must be either a U.S. Citizen OR a U.S. Permanent Resident/Green Card holder who has resided in the U.S.A for the past 3 years of the past 5 years consecutively with no breaks). 

Desired Qualifications:

• Familiarity with FAA and the National Airspace System (NAS) is a plus but not necessary.

• Professional Mechanical Engineer registration is a plus but not absolutely necessary.

Please Note:  The program budget salary for this role could fall anywhere between high $100,000 to low/high $120,000 with a slight wiggle room (no guarantees) based on relevant experience and assessment.  Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

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If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

August 5, 2026

Pay Range:

Pay Range $87,100.00 - $157,450.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.