Mechanical Systems Design Engineer - Experienced / Lead

Company: Boeing
Location: Saint Charles
Posted on: February 25, 2026

Job Description:

Job Description At Boeing, we innovate and collaborate to make the world a better place. We're committed to fostering an environment for every teammate that's welcoming, respectful and inclusive, with great opportunity for professional growth. Find your future with us. Boeing St. Louis is building the future creating innovative solutions that will define the next generation of aerospace. We are currently seeking Experienced or Senior Mechanical System Design Engineers to develop, maintain and modify air vehicle subsystems (Armament, Crew Systems, Environmental Cooling, Equipment, Fuel, Hydraulics, Landing Gear, Mechanisms and Thermodynamic) and component designs, using 3-D Computer Aided Design tools and/or other design methods, to provide product definition to other engineering groups, production operations, suppliers and external customers throughout the product lifecycle. These positions are located in the St. Louis region and support current and emerging aircraft programs as part of the Air Dominance division in Boeing Defense Space and Security (BDS). Positions will be located at one of the listed locations: Berkeley, MO; Hazelwood, MO; St. Louis, MO; St. Charles, MO; Mascoutah, IL. Position Responsibilities: Level 3 - Develop, integrate and document air vehicle subsystems requirements to establish the system design - Develop, maintain and modify air vehicle subsystems and component designs, using 3-D Computer Aided Design tools and/or other design methods, to provide product definition to other engineering groups, production operations, suppliers and external customers throughout the product lifecycle - Perform, integrate analytical and test results to validate and verify systems and components meet requirements and specifications - Manage supplier development, test and production activities and coordinates with the supplier to optimize the design and achieve program goals - Develop new design/analysis processes and tools to improve the effectiveness, quality and efficiency of the development effort - Investigate emerging technologies to develop concepts for future product designs to meet projected requirements - Work under general direction Level 4 - Develop, integrate and document air vehicle subsystems requirements to establish the system design - Develop, maintain and modify air vehicle subsystem and component designs, using 3-D Computer Aided Design tools and/or other design methods, to provide product definition to other engineering groups, production operations, suppliers and external customers throughout the product lifecycle - Lead performance, integration and analysis of tests to validate and verify systems and components meet requirements and specifications - Manage supplier development, test and production activities and coordinates with the supplier to optimize the design and achieve program goals - Assist with investigation of emerging technologies to develop concepts for future product designs to meet projected requirements - Work under minimal direction Basic Qualifications (Required Skills / Experience): - Bachelor of Science degree in Engineering (with a focus on Mechanical, Civil, Aerospace Aeronautical or Material Sciences) - Level 3: 5 or more years' related work experience or an equivalent combination of technical education and experience - Level 4: 9 or more years' related work experience or an equivalent combination of technical education and experience - Experience using NX / Teamcenter and familiarity with reading 2-D drawings - This position requires the ability to obtain a US Security Clearance for which the US Government requires US Citizenship as a condition of employment. An interim and/or final U.S. Secret Clearance Post-Start is required. Preferred Qualifications (Desired Skills / Experience): - Structural Design experience on military or commercial aircraft Successful candidates for this job must satisfy the Company's Conflict of Interest (COI) assessment process. Drug Free Workplace: Boeing is a Drug Free Workplace where post offer applicants and employees are subject to testing for marijuana, cocaine, opioids, amphetamines, PCP, and alcohol when criteria is met as outlined in our policies. At Boeing, we strive to deliver a Total Rewards package that will attract, engage and retain the top talent. Elements of the Total Rewards package include competitive base pay and variable compensation opportunities. The Boeing Company also provides eligible employees with an opportunity to enroll in a variety of benefit programs, generally including health insurance, flexible spending accounts, health savings accounts, retirement savings plans, life and disability insurance programs, and a number of programs that provide for both paid and unpaid time away from work. The specific programs and options available to any given employee may vary depending on eligibility factors such as geographic location, date of hire, and the applicability of collective bargaining agreements. The Boeing 401(k) helps you save for your future, with contributions from Boeing that can help you grow your retirement savings. Our best-in-class retirement benefit features: - Best in class 401(k) plan: we'll match your contributions dollar for dollar, up to 10% of eligible pay with Immediate 100% vesting - Student Loan Match: The Boeing 401(k) Student Loan Match allows eligible enrolled U.S. employees to have their qualified student loan debt payments counted, along with any match-eligible contributions they make, for purposes of determining the Company Match to employees' Boeing 401(k) accounts. Pay is based upon candidate experience and qualifications, as well as market and business considerations. Summary Pay Range: Level 3: $103,700 - $140,300 Level 4: $126,650 - $171,350 Applications for this position will be accepted until Mar. 11, 2026 Education Bachelor's Degree or Equivalent Required Relocation This position offers relocation based on candidate eligibility. Security Clearance This position requires the ability to obtain a U.S. Security Clearance for which the U.S. Government requires U.S. Citizenship. An interim and/or final U.S. Secret Clearance Post-Start is required. Visa Sponsorship Employer will not sponsor applicants for employment visa status. Shift This position is for 1st shift Equal Opportunity Employer: Boeing is an Equal Opportunity Employer. Employment decisions are made without regard to race, color, religion, national origin, gender, sexual orientation, gender identity, age, physical or mental disability, genetic factors, military/veteran status or other characteristics protected by law.

Keywords: Boeing, O'Fallon , Mechanical Systems Design Engineer - Experienced / Lead, Engineering , Saint Charles, Missouri