Senior Mechanical Engineer

Leidos Holding$87K — $157K *
Aerospace & Defense
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's degree and 4+ years of relevant experience or Master's degree with 2+ years.
  • 4 years of mechanical engineering experience in project management and design.
  • Experience with HVAC systems and indoor air quality systems.
  • Proficient in performing and verifying heat load calculations.
  • Experience preparing design development and construction drawings.
  • Ability to obtain a Public Trust Security Clearance.

Responsibilities

  • Provide expertise in the complete project management lifecycle.
  • Oversee feasibility, design, planning, and installation of HVAC and control systems.
  • Participate in team reviews of design and project scope.
  • Conduct heat load calculations and energy compliance verification.
  • Analyze existing engineering documentation for accuracy and completeness.
  • Create CADD drawings using AutoCAD in accordance with FAA standards.
  • Assist in drafting project scope agreements and schedules.

Benefits

  • Opportunity for 1-2 days of remote work with manager's approval.
  • Collaborative work environment within the FAA.
  • Engagement in significant modernization projects for air traffic control.
  • Access to professional development opportunities within federal aviation.
  • Potential to obtain valuable Public Trust Security Clearance.
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: 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.

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.

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.

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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.

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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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