Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Senior Scientist, Mechanical Engineer

$146k - $208.5k

L3Harris Technologies

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers' mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do.

L3Harris is the Trusted Disruptor in defense tech. With customers' mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.

Job Title: Senior Scientist, Mechanical Engineer
Job Code: 45278
Job Location: Palm Bay, FL; Carlsbad, CA; Chantilly, VA
Job Schedule: 9/80: Employees work 9 out of every 14 days – totaling 80 hours worked, and have every other Friday off

Job Description:

During its 120-year history, L3Harris has transformed communications and information technology. L3Harris is a proven leader in tactical communications, geospatial systems and services, air traffic management, environmental solutions, avionics and electronic warfare, and space and intelligence. From ocean to orbit and everywhere in between, we provide mission-critical solutions to connect, inform and protect the world.

On the L3Harris team, your job is to secure the world. We don't work here just for the advanced technology and equipment: we work here because we know what - and who - we're protecting! From families to the intelligence community, and from our climate to our men and women in uniform - we're making the world a safer place!

Design and qualify the precision mechanisms behind mission systems used in complex, high-consequence environments. You'll own major components and sub-systems from early concepts through integration and test, helping L3Harris deliver dependable capability for customers executing their most challenging missions.

This is an on-site role because the work includes direct lab, prototype, integration, and hardware-test activity at one of the following sites: Palm Bay, Florida; Chantilly, Virginia; or Carlsbad, California.

Essential Functions:

  • Lead mechanical design, analysis, prototype integration, and qualification testing for precision mechanisms and electro-mechanical hardware.
  • Develop 3D models, drawings, technical data packages, and assembly documentation.
  • Evaluate material selections and design trades; improve designs for performance, size, weight, power, manufacturability, and reliability.
  • Plan and execute component and system-level tests; analyze results and drive design improvements.
  • Present designs and results at internal and customer reviews, including peer reviews, PDRs, and CDRs.
  • Partner with manufacturing, quality, configuration management, suppliers, technicians, and the program test team to transition designs into production.
  • Support field-test or demonstration activities as needed.
  • Recognized as an internal expert and thought leader in area of expertise with broad experience across multiple job areas. Works under consultative direction against annual goals to manage large, complex project initiatives of strategic importance to the organization. Communicates within and outside of the organization to influence leadership to accept new practices, approaches, and concepts. Develops or champions new systems, concepts, or technologies. Recommends tactics and strategies that directly impact the achievement of overall business or functional results.

Qualifications:

  • Requires both advanced business knowledge and highest level of technical mastery in functional area. Leadership capability to guide business or functional teams without formal management role. Bachelor's Degree with a minimum of 15 years of prior related experience. Graduate Degree with a minimum of 13 years of prior related experience. In lieu of a degree, minimum of 19 years of prior related experience.
  • Active Top Secret or Top Secret/SCI clearance is required. (Active within the last two years will be considered)

Preferred Additional Skills:

  • Hands-on experience designing, developing, integrating, and testing complex mechanical hardware.
  • Experience with 3D mechanical CAD, engineering drawings, and tolerance analysis/GD&T.
  • Ability to work on-site in a mis of office and laboratory environments.
  • Experience in design or development of precision mechanisms, mechatronic systems, and/or packaging of modules and electronics with considerations of thermal and structural loading and for optimizations of size, weight, and power.
  • Proficiency in CAD tools such as Creo and understanding of ASME Y14.5 Geometric Dimensioning and Tolerancing standards.
  • Experience in additive manufacturing, part optimization, and design for manufacture and assembly a plus.
  • Experience with any of the following: actuators, custom gear trains, electro-optical systems, materials testing, and manufacturing processes.
  • Favorable polygraph.

In compliance with pay transparency requirements, the salary range for this role in California and Virgina is $146,000 - $208,500. This is not a guarantee of compensation or salary, as final offer amount may vary based on factors including but not limited to experience and geographic location. L3Harris also offers a variety of benefits, including health and disability insurance, 401(k) match, flexible spending accounts, EAP, education assistance, parental leave, paid time off, and company-paid holidays. The specific programs and options available to an employee may vary depending on date of hire, schedule type, and the applicability of collective bargaining agreements. 

LI-FS1

L3Harris Technologies is proud to be an Equal Opportunity Employer. L3Harris is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws. L3Harris maintains a drug-free workplace and performs pre-employment substance abuse testing and background checks, where permitted by law.

Please be aware many of our positions require the ability to obtain a security clearance. Security clearances may only be granted to U.S. citizens. In addition, applicants who accept a conditional offer of employment may be subject to government security investigation(s) and must meet eligibility requirements for access to classified information.

By submitting your resume for this position, you understand and agree that L3Harris Technologies may share your resume, as well as any other related personal information or documentation you provide, with its subsidiaries and affiliated companies for the purpose of considering you for other available positions.

L3Harris Technologies is an E-Verify Employer. Please click here for the E-Verify Poster in English or Spanish . For information regarding your Right To Work, please click here for English or Spanish

Vacancy posted 1 day ago
Similar jobs that could be interesting for youBased on the Senior Scientist, Mechanical Engineer in Herndon, VA vacancy
  • $192.5k - $252.5k

     ...globe who think that’s work worth doing.Senior Applied ScientistWhy We Have This RoleWe...  ...talented and innovative Senior Applied Scientist to bring our Machine Learning and Artificial...  ...feedback from other specialists, engineers, and product managers.Lead and engage in... 
    Senior
    Full time
    Work at office
    Relocation package
    3 days per week

    Qualtrics

    Reston, VA
    1 day ago
  • $132.29k - $161.69k

     ...67Job DescriptionPosition Summary Lead, evaluate, design, and engineer projects and systems to specification on projects ranging from...  ...general understanding of system operations.Ability to read complex mechanical and plumbing plansExcellent verbal and written communication... 
    Senior
    Work at office
    Immediate start
    Flexible hours

    Southland Industries

    Dulles, VA
    4 days ago
  • $89.65k - $152.4k

    SENIOR ECONOMISTICF is looking for an Senior Economist to join our Regulatory, Policy and Economics business portfolio where we support...  ...within a multidisciplinary team that includes economists, scientists, modelers, regulatory specialists, and other subject matter experts... 
    Senior
    Full time
    Contract work
    Work experience placement
    Work at office
    Local area
    Remote work

    ICF

    Reston, VA
    4 days ago
  •  ...Senior Mechanical Engineer Onsite : Sterling, VA About Accelevation Accelevation (Nasdaq: ACCV) designs, manufactures and installs mission-critical infrastructure powering the world's most advanced technologies. Our vertically integrated model combines U... 
    Senior

    Accelevation LLC

    Sterling, VA
    1 day ago
  • $146k - $194k

     ...focused on positioning Anduril as a lead provider of specialized engineering and products for Intelligence Community (IC) customers. We...  ...security requirements.ABOUT THE JOBWe are looking for a Senior Mechanical Engineer to join our rapidly growing team in Reston, Virginia... 
    Senior
    Full time
    Work experience placement
    Immediate start

    Anduril Industries

    Reston, VA
    3 days ago
  • $81.5k - $138.55k

    SENIOR TOXICOLOGISTTo support ICF’s dynamic growth and expanding client base, we are seeking a Senior Toxicologist to work in our Health Science Portfolio. This group of 100+ science professionals provide toxicology, hazard assessment, epidemiology, risk assessment, exposure... 
    Senior
    Full time
    Contract work
    Work experience placement
    Work at office
    Remote work

    ICF

    Reston, VA
    1 day ago
  • $150k - $175k

    In this role, you own the mechanical design of spacecraft electronics assemblies. You'll take the design through from CAD...  ...a high level of trust in their staff to use their own engineering judgement.This is a senior role, and has a real importance in the team. As well as... 
    Senior
    Permanent employment
    Work at office

    Aegis Search

    Herndon, VA
    2 days ago
  •  ...Triad Engineering, Inc. has an immediate need for a Senior Geologist  in our Sterling, VA office. Excellent compensation and benefits package including...  ...Supervise and mentor geologists, environmental scientists, and field technicians. Oversee implementation of... 
    Senior
    Temporary work
    For subcontractor
    Work at office
    Local area
    Immediate start
    Work from home
    Night shift

    Triad Engineering

    Sterling, VA
    4 days ago
  • $102k - $189k

     ...solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Senior Specialist, Mechanical Engineer Job Code: 45281 Job Location: Sterling, VA Job Schedule: 9/80: Employees work 9 out of every 14 days -... 
    Senior
    Work at office
    Local area
    Flexible hours

    Harris Corporation

    Sterling, VA
    4 days ago
  • $167.1k - $226.1k

     ...We are looking for an Applied Scientist to be a founding scientist on the Engineering and R&D team within Leo Space Security...  ...guardrails and validation mechanisms that make automated decisions trustworthy...  ...226100.00 USD annually Required Experience: Senior IC ]]... 
    Senior
    Permanent employment
    Full time
    Flexible hours

    Amazon Leo

    Herndon, VA
    5 days ago
  • $61.9k - $141k

     ...547 Physicist and All-Source Analyst, Senior The Opportunity: Support defense analytical...  ...or limitation analysis, reverse engineering analysis or characterizations, and...  ...degree in Nuclear Engineering, Physics, Mechanical Engineering, Aerospace Engineering, or Chemical... 
    Senior
    Full time
    Contract work
    Part time
    Local area
    Remote work

    Booz Allen Hamilton

    Reston, VA
    4 days ago
  •  ...locations around the world.#LI-ME1 Major Responsibilities: Plans, schedules, conducts, and coordinates detailed phases of engineering work in mechanical discipline in a project or staff group. Performs work that involves conventional engineering practice but may include... 
    Senior
    16 hours
    Contract work
    Part time
    For contractors
    Work experience placement
    For subcontractor
    Local area
    Remote work
    Relocation

    Bechtel Global Corporation

    Reston, VA
    1 day ago
  • $84.76k - $129.5k

     ...preparation or review of: Modification packages for operating nuclear power plants Functional mechanical drawings and/or drawings for nuclear power plant systems Engineering analyses and evaluations to support modifications and operation of plant systems Technical... 
    Senior
    Hourly pay
    Work at office
    Local area
    Worldwide
    Flexible hours

    Nuclear Power Group

    Reston, VA
    1 day ago
  •  ...limited to: Supports defense analytical requirements with enhanced scientific research, capability / limitation analysis, reverse engineering analysis / characterizations, facility and vulnerability assessments. This includes, but is not limited to, applied and... 
    Senior
    Full time
    Work at office
    Local area

    Castalia Systems

    Reston, VA
    2 days ago
  • $136.6k - $184.8k

     ...You’ll join a diverse team of software, hardware, and network engineers, supply chain specialists, security experts, operations...  ...to own them to completion.Amazon Web Services is seeking a Senior Mechanical Engineer to be part of a global engineering team responsible... 
    Senior
    Flexible hours

    AmazonWebServices

    Herndon, VA
    21 hours ago
  • $136.6k - $184.8k

     ...You’ll join a diverse team of software, hardware, and network engineers, supply chain specialists, security experts, operations managers...  ...job responsibilities- Design and implement energy-efficient mechanical systems for next-generation data centers- Lead cross-functional... 
    Senior
    Work at office
    Flexible hours

    Amazon

    Herndon, VA
    2 days ago
  • $100k - $140k

     ...Short Description Bowman has an opportunity for a Senior Mechanical Project Manager to join our team in Herndon, VA. At Bowman, we...  ...guidance, and knowledge to junior project managers, design engineers, and project engineers. At the Operational and Company Level... 
    Senior
    Hourly pay
    Contract work
    For subcontractor
    Work at office

    Bowman

    Herndon, VA
    9 hours ago
  • $98.5k - $206.8k

    Job Title: Senior ScientistJob Category: EngineeringTime Type: Full timeMinimum Clearance...  ...portfolio is seeking an experienced scientist familiar with translating signals and techniques...  ...relevant experienceDegree in Electrical Engineering, Signals Processing, Physics, or a... 
    Senior
    Contract work
    Work experience placement
    Local area
    Remote work
    Flexible hours

    CACI International

    Chantilly, Loudoun County, VA
    4 days ago
  • $180k - $250k

    Job DescriptionEverforth ECS is seeking a Senior Computational Scientist to work in our Springfield, VA customer site and Fairfax, VA corporate...  ...Learning (AI/ML), and high-performance computing (HPC) engineering. You will design robust algorithms, optimize high-performance... 
    Senior
    Remote work

    ECS Federal

    Fairfax, VA
    23 hours ago
  • $88.4k - $154.7k

     ...potential. Unleash your talent and redefine what’s possible.Job Description:Parsons is looking for an amazingly talented Senior Mechanical Engineer to join our team! In this role, you will get to use your mechanical engineering skills to focus on HVAC, plumbing, fire suppression... 
    Senior
    Full time
    Contract work
    Remote work
    Flexible hours

    Parsons

    Centreville, VA
    4 days ago
  • $124k - $164k

    Job DescriptionDewberry is currently seeking a motivated Senior Environmental Scientist in the Mid-Atlantic region. This position offers flexibility...  ...leading collaborations with scientists, engineers, and subconsultants for large and complex transportation... 
    Senior
    Full time
    Contract work
    Work at office
    Local area

    Dewberry

    Fairfax, VA
    3 days ago
  • $160k - $240k

     ...Senior Mechanical Engineer Opportunity At Whitman, Requardt & Associates, LLP, we are "People Focused and Project Driven". We have been in business for more than 110 years and we are known for our quality work and developing quality employee careers. We are seeking... 
    Senior
    Full time
    Temporary work
    H1b
    Work at office
    Local area
    Flexible hours

    Whitman Requardt and Associates

    Fairfax, VA
    1 day ago
  • $146.4k - $219.6k

     ...Posted Wednesday August 19th, 2026 at 9:46 AM | Expires Thursday, December 31st, 2026 at 12:59 AM Position Summary: A Senior Mechanical Engineer in our Mission Critical practice will have the opportunity to design the most complex advanced building systems, prepares... 
    Senior
    For contractors
    Casual work
    Work at office
    Remote work
    Flexible hours

    Henderson Engineers

    Chantilly, Loudoun County, VA
    1 day ago
  • $102k - $189k

    Job Title: Senior Specialist, Integration & Test Engineer (Mechanical Integration Engineer)Job Code: 44812Job Location: Chantilly, VA (On-Site)Job Schedule: 9/80: Employees work 9 out of every 14 days - totaling 80 hours worked, and have every other Friday offJob Description... 
    Senior
    Flexible hours

    L3Harris Technologies

    Chantilly, Loudoun County, VA
    21 hours ago
  • $110k - $125k

     ...Overview Seeking an experienced Senior Naval Architect to support The USCG Ship...  ...for major acquisition efforts. Review engineering designs and shipbuilder deliverables for...  ...Marine Engineering, Naval Architecture, Mechanical Engineering, or related technical field... 
    Senior
    Work at office
    Remote work

    American Systems

    Vienna, VA
    3 days ago
  • MITRE is seeking a ComputFi Scientist to join FINLab and the Complex Systems Department. You will provide expert analysis, develop novel financial analytics, and advise on regulatory issues for US government clients. The role emphasizes doing research, collaborating with... 
    Senior

    MITRE

    Mc Lean, VA
    4 days ago
  • DescriptionGPI seeks a Project Manager - Senior Mechanical HVAC Engineer for our Metro DC branch in Rockville, MD, or the Fairfax, VA office. In this role, you will have the opportunity to grow and direct a project team. Do you value a company that puts employee satisfaction... 
    Senior
    Contract work
    For subcontractor
    Work at office

    GPI

    Fairfax, VA
    2 days ago
  • $136.6k - $184.8k

     ...diverse team of software hardware and network engineers supply chain specialists security...  ...field - Knowledge of critical data center mechanical and electrical equipment - Experience...  ...- 136600.00 - 184800.00 USD annually Required Experience: Senior IC ]]... 
    Senior
    Full time
    Flexible hours

    Amazon

    Herndon, VA
    14 days ago
  • $150k - $190k

     ...into realities that transform the world for good. Your impact Knack Works, a Jacobs Company, has an opening for a Senior Network/Systems Tools Engineer to support the Intelligence Sector.The job duties are as follows:• System Architecture: Design, implement, and maintain... 
    Senior
    Full time
    Work at office
    Immediate start

    Jacobs

    Chantilly, Loudoun County, VA
    4 days ago
  • Dewberry seeks a Senior Environmental Scientist to join a collaborative Mid-Atlantic team. The role supports wetland science, regulatory permitting, NEPA documentation, and construction compliance across several Virginia offices and Owings Mills, Maryland. You will lead... 
    Senior

    Dewberry

    Fairfax, VA
    5 days ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Senior Scientist, Mechanical Engineer. Be the first to apply!