We are seeking a Senior Manufacturing Engineer onsite in Fairfield, CA, to support production operations in aerospace manufacturing. The role involves hands-on floor support, developing and validating manufacturing processes, designing fixtures and tooling, and ensuring product quality through process validation and NDT techniques. Candidates should have a bachelor’s degree in engineering with 3+ years of relevant experience, proficiency in SolidWorks and MS Office, and U.S. citizenship. Preferred qualifications include experience in regulated aerospace environments, quality systems, and lean manufacturing. The position offers a competitive salary ($95,500 - $181,700) and comprehensive benefits, including health insurance, retirement plans, tuition reimbursement, and wellness programs. This role is essential in supporting safe, compliant, and efficient production to help shape future aerospace innovations. Relocation assistance is provided. Candidates may be required to attend some interviews in person. RTX is an equal opportunity employer.