Mechanical Design Engineer Sr - E3

Standard Job Description

Lockheed Martin is a global security and aerospace company that employs approximately 114,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration, and sustainment of advanced technology systems, products, and services. Lockheed Martin Missiles and Fire Control (MFC) is one of four Lockheed Martin business areas.

We are seeking a Senior Mechanical Design Engineer to support the RF Product Center in Grand Prairie, TX. This role will be responsible for designing, developing, and optimizing custom fixtures and setups that enable efficient, repeatable, and high‑quality testing of RF sensor assemblies and subassemblies. The qualified candidate will work closely with hardware design and test teams to ensure fixtures meet tolerances, safety standards, and test goals while minimizing cost and lead time.

Key Responsibilities:

Design and implement test fixtures to support several developmental test activities on an RF-based sensor system.

Produce detailed 3‑D models and 2‑D drawings using CAD tools (e.g., SolidWorks, CATIA, Creo) following company standards and GD&T practices.

Perform structural, thermal, and kinematic analyses (FEA, tolerance stack‑up) to verify fixture performance under load and during operation.

Work closely with cross-functional teams, including design, manufacturing, and test engineering, to ensure seamless integration of developmental test activities.

This position is in Grand Prairie, TX.

MUST BE A U.S. CITIZEN - This position is located at a facility that requires special access. The selected candidate must be able to obtain a secret clearance.

Basic Qualifications

• Mechanical Engineering degree or equivalent with a minimum of 5 years of experience in a relevant industry.
• Proficient in Computer Aided Design (CREO preferred).
• Ability to produce detailed drawings.
• Experience with GD&T.
• Understanding of machining, additive manufacturing, welding, and assembly processes.
• Excellent communication and interpersonal skills, with ability to work effectively with cross-functional team.
• Active secret security clearance or the ability to obtain a Secret clearance. Must be a U.S. Citizen.

Desired Skills

• Knowledge of rapid prototyping (3‑D printing, CNC machining) for fixture development.
• Exposure to automation and robotics integration for fixture handling.
• Experience with Lean Manufacturing, Six Sigma, or other process improvement methodologies.
• Familiarity with standards such as ASME Y14.5, ISO 2768, and MIL‑STD‑810.
• Prior RF system experience.

Pay Information

Full-Time Salary Range: $85300.00 - $158300.00

At Lockheed Martin, we know mission success starts with taking care of our people. Our Total Rewards program is designed to attract top talent, support your well-being, and help you grow-both professionally and personally.

The salary range for this position is as listed on the requisition. Please note that the salary information listed is a general guideline only. Lockheed Martin considers factors such as (but not limited to) scope and responsibilities of the position, candidate's work experience, education/ training, key skills as well as market(work location) and business considerations when extending an offer.

Benefits offered: Medical, Dental, Vision, Flexible work arrangements and schedules (e.g., 4x10), 401(k) match, Paid time off, Holidays, Parental Leave, EAP, Flexible Spending Accounts, Education Assistance, Life Insurance, Short-Term Disability, and Long-Term Disability.

• Annual short-term and/or long-term incentive compensation programs may be offered depending on the position. Payments under these annual programs are not guaranteed and can vary from year to year and are tied to a range of performance metrics.
• For (Washington state applicants only) Non-represented full-time employees: accrue at least 10 hours per month of Paid Time Off (PTO) to be used for incidental absences and other reasons; receive at least 90 hours for holidays. Represented full time employees accrue 6.67 hours of Vacation per month; accrue up to 52 hours of sick leave annually; receive at least 96 hours for holidays. PTO, Vacation, sick leave, and holiday hours are prorated based on start date during the calendar year.