Senior Mechanical Engineer (Onsite)

Prattwhitney; Largo (FL); On-site; USD 87,000 - 165,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

401(k) plan with company match

Job summary

Pratt & Whitney in Largo, Florida is seeking an experienced Mechanical Engineer to design, develop, analyze, and document hardware for defense systems, from concept through production. You will collaborate with engineering teams and suppliers, support integration, and mentor junior engineers while working onsite.

A DoD security clearance and STEM degree are required, with advanced degrees preferred. The role emphasizes fast-paced problem solving, rigorous GD&T practices, and hands-on hardware

Qualifications

• Experience from concept through production transitions.
• Proven mechanical design, material selection and manufacturing process knowledge.
• Experience with design verification and prototyping.

Responsibilities

• Perform mechanical design, development, and documentation of hardware.
• Provide support to production and suppliers during product integration.
• Interface with engineering managers, engineers, designers and analysts to resolve technical challenges.
• Work with limited supervision to meet schedule, cost, and technical goals.
• Participate in reviews and trade studies for sound decisions.
• Mentor and guide less experienced engineers.

Skills

Mechanical design

Hardware development

CAD design tools

ANSYS/Flotherm analysis

Electronics assemblies design

Defense industry experience

Education

STEM degree

Advanced degree in mechanical engineering

Tools

CREO CAD

PDM tooling

ANSYS

Flotherm

Job description

Date Posted: 2026-08-31 Country: United States of America Location: US-FL-LARGO-382SS ~ 7887 Bryan Dairy Rd. ~ BLDG 100 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: The ability to obtain and maintain a U.S. government issued security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance Security Clearance Type: DoD Clearance: Secret Security Clearance Status: Active and existing security clearance required after day 1

What You Will Do

• Perform mechanical design, development, analysis and documentation of components and assemblies in accordance with system requirements.
• Provide support to production and suppliers during product integration.
• Interface with the broader organization to develop design solutions and resolve technical challenges. This can include engineering managers, engineers, designers, and structural/thermal analysts, other disciplines, program management, suppliers, and external customers.
• Work with limited supervision and meet commitments for assigned schedule, financial, and technical goals.
• Support and participate in reviews and conduct trade studies to make sound technical decisions.
• Apply knowledge and experience in technical problem solving and hardware development in a fast paced, team environment.
• Mentor and guide less experienced engineers.

Qualifications

• Experience designing and developing hardware, ranging from concept definition through detailed design and transition to production or product support.
• Demonstrated experience in mechanical design, product development, material selection, and manufacturing processes.
• Experience with CAD design tools and associated product data management tools.
• Experience solving technically challenging problems within aggressive timelines.
• Requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 5 years prior relevant experience or an advanced degree in a related field and minimum 3 years of experience.
• The ability to obtain and maintain a U.S. government issued security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
• Experience with design, fabrication, and integration of electronic assemblies, circuit card assemblies, structural components, equipment packaging and layout, and military defense systems.
• CREO CAD system experience and PDM or similar product data management tools.
• Previous experience with structural and/or thermal analysis using ANSYS, Flotherm and/or other analytical tools.
• Knowledge of geometric dimensioning and tolerancing and ASME Y14.5.
• Demonstrated hands‑on mechanical aptitude.
• Prior defense industry experience, designing and solving problems for high reliability systems operating within harsh military environments.
• Working knowledge of military and commercial design, materials, and process specifications.
• Experience diagnosing and resolving hardware issues during prototyping, production and test.
• Experience with EVMS or other professional exposure to similar budget tracking systems.
• ACTIVE Secret Security Clearance or higher.
• Advanced degree in mechanical engineering.

What We Offer

• Medical, dental, and vision insurance
• Three weeks of vacation for newly hired employees
• Generous 401(k) plan that includes employer matching funds and separate employer retirement contribution, including a Lifetime Income Strategy option
• Tuition reimbursement program
• Student Loan Repayment Program
• Life insurance and disability coverage
• Optional coverages you can buy pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protection
• Birth, adoption, parental leave benefits
• Carrot Health to hormonal health, fertility, and family building Adoption Assistance
• Autism Benefit
• Employee Assistance Plan, including up to 10 free counseling sessions
• Healthy You Incentives, wellness rewards program
• Doctor on Demand, virtual doctor visits
• Bright Horizons, child and elder care services
• May be eligible for Relocation
• Hired applicants may be eligible for benefits, including but not limited to, medical, dental, vision, life insurance, short-term disability, long-term disability, 401(k) match, flexible spending accounts, flexible work schedules, employee assistance program, Employee Scholar Program, parental leave, paid time off, and holidays.
• Hired applicants may be eligible for annual short-term and/or long-term incentive compensation programs depending on the level of the position and whether or not it is covered by a collective-bargaining agreement.

Mission Systems

Mission Systems: Do you want to be a part of something bigger? A team whose impact stretches across the world, and even beyond? At Collins Aerospace, our Mission Systems team helps civilian, military and government customers complete their most complex missions — whatever and wherever they may be. Our customers depend on us for intelligent and secure communications, missionized systems for specialized aircraft and spacecraft and collaborative space solutions. By joining our team, you’ll have your own critical part to play in ensuring our customer succeeds today while anticipating their needs for tomorrow.

#MISENG As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote. The salary range for this role is 86,800 USD - 165,200 USD. The salary range provided is a good faith estimate representative of all experience levels. RTX 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. This role is a U.S.-based role. If the successful candidate resides in a U.S. territory, the appropriate pay structure and benefits will apply. RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window.

RTX is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or veteran status, or any other applicable state or federal protected class. RTX provides affirmative action in employment for qualified Individuals with a Disability and Protected Veterans in compliance with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act.

RTX is an aerospace and defense company that provides advanced systems and services for commercial, military and government customers worldwide. It comprises three industry‑leading businesses – Collins Aerospace, Pratt & Whitney, and Raytheon. Its 195,000 employees enable the company to operate at the edge of known science as they imagine and deliver solutions that push the boundaries in quantum physics, electric propulsion, directed energy, hypersonics, avionics and cybersecurity. The company, formed in 2020 through the combination of Raytheon Company and the United Technologies Corporation aerospace businesses, is headquartered in Arlington, Virginia.