Senior Mechanical Engineer

Leidos Holding$120K — $130K *
Aerospace & Defense
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's degree and 8+ years of experience OR Master's degree with 4+ years; additional relevant experience may substitute for degree.
  • 8 years of mechanical engineering experience, particularly in building mechanical systems.
  • Knowledge of various HVAC systems including ductless splits, heat recovery, chillers, and air handling units.
  • Experience in performing verified heat load calculations for system sizing.
  • Proficient in creating construction drawings for mechanical systems using AutoCAD.

Responsibilities

  • Provide project management expertise throughout the project's lifecycle.
  • Oversee design, planning, and installation of HVAC and environmental control systems.
  • Participate in design reviews and provide feedback on project scope and design packages.
  • Conduct heat load calculations for HVAC systems to ensure energy compliance.
  • Review engineering drawings for accuracy and provide improvement recommendations.
  • Create CADD drawings in compliance with FAA standards.
  • Assist in drafting project scope agreements and schedules.
  • Conduct risk assessments and propose mitigation strategies.

Benefits

  • Partial telework options available with manager's approval.
  • Opportunities to work on integral FAA projects in a collaborative environment.
Full Job Description
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:  Must be able to work onsite in El Segundo, CA. The position has partial telework potential for part of the work week with manager’s approval. Required Qualifications:
  • Bachelor's degree and 8+ years of prior relevant experience OR Master's degree with 4+ years of prior relevant experience. Additional years of relevant experience maybe considered/accepted in lieu of degree.  

  • 8 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 $120,000 to high $130,000 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. Original Posting:
July 13, 2026 Pay Range:
Pay Range $107,900.00 - $195,050.00 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.

About Leidos Holding

Leidos Holding Careers

Joining Leidos Holding presents an unparalleled opportunity to advance one's career with a leader in innovation and technology. The company offers a plethora of job opportunities aimed at fostering professional growth and development in a diverse and inclusive environment.

Explore Career Opportunities

Leidos Holding is actively seeking skilled professionals who are passionate about leveraging their expertise to drive innovation and leadership in their fields. With a variety of open positions, Leidos Holding provides a platform for individuals to challenge themselves in a dynamic work environment.

Innovation and Professional Growth

At Leidos Holding, innovation is at the core of everything they do. Employees are encouraged to think creatively and push boundaries. The company supports this drive for innovation through comprehensive professional development and diversity training programs that are designed to enhance skills and foster leadership.

Commitment to Diversity and Inclusion

Leidos Holding is committed to creating a workplace where diversity is not only recognized but celebrated. With a culture that values and promotes diversity, Leidos Holding ensures that all team members have the opportunity to contribute, learn, and grow.

Internship Programs

For those starting their career, Leidos Holding offers internship programs that provide a robust foundation in the industry. Internships are a great way to develop essential skills, gain valuable work experience, and build professional networks.

Benefits and Culture

Employees at Leidos Holding enjoy a range of benefits designed to support their professional and personal lives. The company culture is built on a foundation of respect and integrity, providing a supportive and collaborative environment where every team member is valued.

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Leidos Holding is hiring! Explore job opportunities that match your skills and interests. Leidos Holding looks for driven, curious, and innovative individuals to join their team. Positions are available across various disciplines and experience levels.

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Leidos Holding encourages its employees to engage in networking within the company to discover new opportunities for career advancement. The leadership team at Leidos Holding is dedicated to supporting employees in their career paths with ample opportunities for networking and growth.

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Discover the exciting career opportunities at Leidos Holding today. With a commitment to employee growth, innovation, and diversity, Leidos Holding is the perfect place to advance your career. Check out the latest job listings and find your perfect fit at Leidos Holding.

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