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Senior Mechanical Engineer

Thales Defense & Security, Inc.
medical insurance, parental leave, paid time off, paid holidays, tuition reimbursement, 401(k)
United States, New York, Great River
Jun 03, 2026
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Senior Mechanical Engineer
Location:


Great River, NY, US, 11739




Job Title:Senior Mechanical Engineer - Subsea Systems (ROV)

Job Location: Great River, NY, Clarksburg, MD

Advanced Acoustic Concepts, LLC, a wholly owned subsidiary Thales Defense & Security Inc., is a technical leader in the fields of sonar systems, sonar signal processing, acoustic training systems, and open architecture system and software integration. The venture focuses on emerging areas in the undersea warfare domain where the customer has identified mission-critical needs. For additional information about Advanced Acoustic Concepts, please visit our website at: https://www.aaccorp.com.

Top Benefits(Subject to terms of applicable policies/plans)



  • Competitive Salary
  • Yearly Incentive Compensation Plan
  • Medical insurance for self and eligible family members
  • Generous 401(k) program - up to 7% company contribution and 100% immediate vesting
  • Tuition Reimbursement
  • Paid time off and paid holidays
  • Paid maternity, paternity, and parental leave
  • 9/80 Work Schedule (every other Friday off)
  • Onsite Full Time



Position Summary

Responsible for leading group of engineers on a technical activity and completion of activity on time and budget. Design, develop, analyze, document and support testing of products, systems or subsystems. May use computer-aided engineering or other design/analysis software in the performance of assignments.

The Senior Mechanical Engineer will lead the mechanical design, development, and execution of subsea systems, with a primary focus on Remotely Operated Vehicles (ROVs). This role requires technical expertise in underwater vehicle systems design, and the ability to guide projects from concept through deployment, including design, analysis, production, and testing. The position is primarily office-based with periodic travel support during testing and operations.

Responsibilities:



  • Responsible for leading group of engineers on a technical activity and completion of activity on time and budget
  • Design, develop, analyze, document and support testing of products, systems or subsystems
  • May use computer-aided engineering or other design/analysis software in the performance of assignments. Review customer specifications and requirements, and under direction, develop designs to best support them, including cost as a key design variable
  • Provide budget, cost and schedule input for design assignments
  • Specify and evaluate supplier components, subsystems and services
  • Drive the program design to cost and design for manufacture requirements
  • Develop prototypes to retire key development risks
  • Communicate clearly (written and oral) with other company personnel and the customer as required
  • Participate in preparation of proposals
  • Provide technical knowledge and assistance to other engineers and support personnel
  • Lead and direct the work of others as assigned


  • Lead the mechanical design and development of subsea ROV components and systems for the U.S. Navy
  • Perform and oversee engineering analyses including structural, fatigue, and thermal evaluations
  • Develop detailed 3D CAD models, engineering drawings, and technical specifications
  • Select materials and coatings suitable for subsea environments, including high-pressure and corrosive conditions
  • Ensure designs meet applicable industry standards and best practices (ABS experience preferred)
  • Collaborate with multidisciplinary teams (electrical/electro-mechanical, systems/controls, manufacturing) to ensure system integration
  • Define manufacturing approaches, assembly processes, and quality control requirements
  • Oversee prototype fabrication, system integration, and build activities
  • Plan, execute, and lead testing programs including factory acceptance testing (FAT) and subsea trials
  • Analyze performance data and drive design improvements and issue resolution
  • Support offshore operations, testing, and troubleshooting as needed
  • General guidance given on new assignments as needed
  • Support, communicate, reinforce and defend the mission, values and culture of the organization
  • Attend appropriate engineering, customer or business meetings
  • Lead less-experienced engineers



Qualifications:

The requirements listed below are representative of the knowledge, skill, and/or ability required. Reasonable accommodation may be made to enable individuals with disabilities to perform the essential functions.




  • Bachelor's degree in an applicable engineering field with 5+ years applicable engineering experience (or equivalent combination of education/training and experience
  • Fluency in technologies and application domain
  • Ability to lead a technical group independently
  • 8+ years of relevant experience in subsea, marine, or similar industries
  • Experience with underwater vehicles or subsea systems design and development
  • Proficiency in CAD/modeling software
  • Strong background in engineering analysis tools, FEA required
  • Proficiency in SolidWorks required
  • Solid understanding of manufacturing processes, GD&T, and design for manufacturability



Additional Preferred Skills:



  • Master's degree in Mechanical Engineering or related discipline
  • Strong leadership and technical decision-making capability
  • Excellent analytical and problem-solving skills
  • Effective communication and cross-functional collaboration
  • Detail-oriented with a strong commitment to quality, reliability, and safety
  • Ability to manage multiple projects and priorities
  • Willingness to engage in hands-on testing and support frequent travel/field-testing, as required
  • Knowledge of subsea materials, sealing systems, pressure housings, and corrosion mitigation desired
  • Strong background in engineering analysis tool CFD a plus
  • Proficiency ANSYS Simulation Software preferred
  • Experience fielding systems for the U.S. Navy is highly desirable
  • Familiarity with ABS standards and classification requirements is highly desirable



Physical Requirements:



  • Lifting (up to 20 lbs.): up to 0-25% of time
  • Walking: up to 0-25% of time
  • Climbing, Bending, Standing, Stooping: up to 0-10% of time
  • Sitting: up to 0-75% of time
  • Travel: up to 25% of time



The annualized pay range for this role is$110,000.00 - 150,000.00 USD along with a discretionary target incentive compensation plan.The pay range provided is a good faith estimate representative of the experience level for the role described above. AAC considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate's work experience, location, education/training, and key skills.

For specific questions about this job posting, candidates may contact talent acquisition at hr@aaccorp.com.

Advanced Acoustic Concepts, LLC is committed to non-discrimination as applicable under federal and state laws.AAC is an E-Verify employer.

If you need accommodation or assistance in order to apply for a position with Advanced Acoustic Concepts, LLC, please call Human Resources at 631-273-5700.

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We collect personal information in this application to evaluate your qualifications for employment and to comply with applicable legal requirements. Your information will be kept confidential and used only for employment-related purposes. Where required by law, you have the right to access, correct, or request deletion of your personal information. If you have questions about how your information is handled, please contact hr@aaccorp.com.



Our Mission

Innovation Enabled, Mission Focused.


Core Values

The Company values the talent, experience and diversity of its employees and seeks to foster a culture that is open, honest, fair, and equitable. We strive to accomplish this through adherence to our core values of Integrity, Quality, Customer Focus, Innovation, and Diversity & Inclusion.

INTEGRITY: As a people of integrity, we firmly adhere to codes of conduct and ethical principles, and strive to do what is right. We value a culture of trust, honesty, and respect. We demand ethical thinking and conduct, whereby ethics and accountability always come first.

Quality: We set high standards of performance for ourselves and others to consistently deliver excellent products and services. We adhere to quality levels demanded by our customers and assume responsibility and accountability to achieve excellence.

CUSTOMER FOCUS: We work to create ongoing and mutually beneficial long-term relationships with customers based on trust. We go above and beyond to meet customer needs and strive to exceed their expectations.

INNOVATION: We believe in investing in innovation that makes a positive impact through our technology and products. We continue to foster an environment that rewards innovation and effective change.

RESPECTFUL WORKPLACE: We continually foster an environment that values different points of view and enables all employees to contribute to their full potential. We cooperate together as a respectful workforce serving our population.




Nearest Major Market: Long Island

Nearest Secondary Market: New York CIty



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