Senior Systems Engineer

Job ID: 8730Req ID: 1381Location: Merrimack, NH, USAPosted: 2026-09-18Job Family: EngineeringJob Function: Systems EngineeringPay Type: Salary Company Information: Twenty-Six Defense, headquartered in Fort Worth, Texas, is a leading provider of high-performance products, system solutions, and aftermarket support services focusing on the defense, homeland security, and commercial aviation markets. With facilities throughout the U.S., Twenty-Six Defense is dedicated to supporting those who contribute to the national security of the United States. Twenty-Six Defense is wholly owned by Elbit Systems Ltd. (NASDAQ: ESLT and TASE: ESLT), a global high-technology company engaged in a wide range of programs for innovative defense and commercial applications. Job Summary: The Senior Systems Engineer performs requirements analysis and management, technical planning, systems level design, systems integration, verification and validation, cost and risk management, and supportability and effectiveness analyses for products in the defense systems portfolio. Analyses are performed during all phases of the product development process to include concept, design, prototyping, test, installation, operation, and maintenance. The Senior Systems Engineer will provide guidance in the development of new defense systems and components functioning as part a System / Integrated Product Team. Responsibilities and Tasks: Review, develop, and document system level requirements, CONOPS, and mission statements. Produce and/or review technical documents, specifications and standards. Perform requirements management, analysis, and allocations on complex systems design. Effectively document and communicate designs, results, reports, and presentations. Work with all Technical functions to develop and document product architectures that meet technical, cost and schedule goals. Perform System Development utilizing Model Based System Engineering best practices. Define and execute trade studies that result in selection of the most optimal approach to complex design and architecture issues Research, conceptualize, and evaluate complex system architectures and product designs, recommend design modifications to improve product performance, cost, reliability, and development schedule (can be activity lead or in supporting role). Develops and maintains collaborative relationships with other Twenty-Six Defense Business Units. Lead customer interactions with regard to influencing and understanding Voice of the Customer and product requirements. Support proposal development activities, including proposal text development, cost estimating, and presentation activities. Drive system integration efforts including hands-on evaluation of prototypes Plan and support verification and validation activities for complex system designs to ensure conformance with functional specifications and customer requirements Prepare and/or deliver technical presentations to customers, Twenty-Six Defense management, or development team. Provide regular and clear communication to customers, Twenty-Six Defense affiliates, government officials, and other contractors as required. Performs workforce planning and resource allocation in coordination with Engineering Functional Leadership and Engineering Business Unit Leads. Ensures lessons learned are identified and incorporated into the standards process. Recommend tools to improve systems engineering design processes and procedures Mentor entry level engineers Assumes the role of System / Integrated Product Team Lead for projects. Utilize the Agile product development approach. Other related duties assigned by supervisor. Education, Experience/Knowledge & License/Certification: Hold an accredited Bachelor’s or Master’s degree in Electrical Engineering, Electro-optical engineering, Mechanical Engineering, or Software Engineering Ability to demonstrate/show principal responsibilities mentioned above (5+ years of engineering experience). Fully understands internal systems engineering procedures. Knowledge and experience in the development of Concept(s) of Operation, requirements development and management, develop system architectures utilizing Model Based System Engineering concepts, conceptualization and analysis of complex systems architecture design, system/subsystem integration/test planning and execution, and qualification testing. Experience in Model-Based Systems Engineering tools (CAMEO) is an advantage. Former military experience in aerospace/avionics/naval/ground systems is an advantage. Computer skills, understanding of basic electrical, mechanical, optical, or software engineering principles. Specific defense or public safety industry experience, including experience with command-and-control software systems, mission computers and displays, complex camera and radar surveillance systems, communications and networking equipment, power equipment, and/or supporting information technology, would be beneficial to the applicant. Must be able to complete a DoD clearance at Secret level. Strong preference for Guidance, Navigation, and Controls (GNC) background. Skills and Abilities: Models Twenty-Six Defense’s core values: People – Twenty-Six Defense is an employee destination, Performance – Achieve industry-leading business performance, Growth – Drive responsible growth that enables us to reinvent for the future. Requires excellent written and oral communication skills, the ability to understand and follow complex, detailed instructions, and the ability to work both independently and in a team environment. Must be able to approach technical problems in a logical and scientific manner. Must be flexible and able to handle multiple priorities and be able to work for short to moderate periods of time without direct supervision. The ability to build robust relationships and work well with people at all levels of the organization, including program management and engineering functional management, is absolutely critical. Travels to customer and affiliate sites located throughout the US in support of all of the above. International travel may also be required on a program-by-program basis. Work independently and with internal/external organizations Travel/Physical Requirements: Able to travel domestically and internationally up to 10-15% to support projects. The work is in person, in office - at least 3 or 4 days in office every week. #LI-AH1 Here Are Some of the Great Benefits We Offer: Most locations offer a 9/80 schedule, providing every other Friday off Competitive compensation & 401(k) program to plan for your future Robust medical, dental, vision, & disability coverage with qualified wellness discounts Basic Life Insurance and Additional Life & AD&D Insurances are available Flexible Vacation & PTO Paid Parental Leave Generous Employee Referral Program Voluntary Benefits Available: Longer Term Care, Legal, Identity Theft, Pet Insurance, and more Voluntary Tricare Supplement available for military retirees This job description does not list all the duties of the job. You may be asked by your supervisors or managers to perform other duties. The employer has the right to revise this job description at any time. The job description is not an employment contract. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions of this position. Twenty-Six Defense is an equal opportunity employer as to all protected groups, including protected veterans and individuals with disabilities. *For Virginia-based positions only* In accordance with Virginia DOL requirements, the listed salary range reflects the anticipated base pay range for this role. Actual compensation will be determined based on factors including skills, experience, education, certifications, business needs, internal equity, and geographic location. Compensation may vary in different locations based on market conditions and cost-of-labor considerations. Please ensure your résumé meets the Dayforce upload requirements. Dayforce supports résumé files up to 4 MB. To avoid upload issues, please: save your résumé as a PDF, remove photos/graphics/embedded objects, ensure the file is under 4 MB, and avoid password‑protected PDFs. If you encounter difficulties, try using a different browser (Chrome, Edge, or Safari), an incognito/private window, clearing browser cache, or disabling browser extensions. If you are unable to upload your resume for parsing, you may manually add resume details and/or attach your resume to the Additional Documents section. If you have exhausted all troubleshooting issues above, you may contact View email address on click.appcast.io . NOTE: Simply emailing a resume to this inbox will not be considered an official application to any job posting.