About this opportunity
RivCut Inc. lists this Senior CNC Machinist / Manufacturing Engineer opportunity in union city, California. Review the employer’s description below for duties, qualifications and application requirements.
Job description
Senior CNC Machinist / Manufacturing Engineer
Own the process. Set the standard. Build something that matters.
Union City, CA · $90,000 – $110,000/year · 7+ years
Reports to: Director of Operations / VP of Manufacturing
About This Role
Lead complex CNC machining projects from setup to final inspection. Program, set up, and operate multi-axis CNC mills and lathes (3, 4, and 5-axis) to produce precision aerospace, defense, and medical components to tight tolerances (±0.0005"). Mentor junior machinists, optimize processes for cycle-time reduction, and collaborate with engineering on DFM reviews.
This role bridges the gap between the shop floor and engineering — you will have real ownership over how parts are made. We’re a startup, which means you won’t just run machines — you’ll help build the systems, the standards, and the culture from the ground up. Everyone here gives 110%.
This position offers the opportunity to work on high-value, complex parts for industries where failure is not an option. You will be instrumental in establishing best practices and driving continuous improvement across our manufacturing operations.
Key Responsibilities
Program and operate 3, 4, and 5-axis CNC mills and multi-axis lathes
Set up machines including work-holding, tooling, and offsets for complex jobs
Perform first-article inspections (FAI) per AS9102 standards
Interpret complex engineering drawings with GD&T (ASME Y14.5)
Mentor and train junior machinists on setups, programming, and best practices
Optimize machining processes for cycle time reduction and quality improvement
Collaborate with engineering on Design for Manufacturability (DFM) reviews
Select appropriate cutting tools, speeds, feeds, and machining strategies
Maintain tight tolerances (±0.0005" or better) on critical aerospace components
Work with aerospace materials: titanium, Inconel, stainless steel, aluminum
Troubleshoot machining issues and implement corrective actions
Maintain detailed documentation of setups, programs, and inspection results
Support new product introduction (NPI) and prove-out processes
Contribute to continuous improvement initiatives and lean manufacturing practices
Requirements
7+ years of CNC milling and/or turning experience
Expert proficiency in Mastercam, Fusion 360, or equivalent CAM software
Strong GD&T interpretation (ASME Y14.5)
Experience with 3, 4, and 5-axis CNC machining
Ability to read and interpret complex engineering drawings
Skilled in first-article inspection (FAI) per AS9102
Proven track record of holding ±0.001" or tighter tolerances
Experience with aerospace materials: titanium, Inconel, stainless steel
Strong problem-solving and analytical skills
Excellent attention to detail and documentation habits
Preferred Qualifications
AS9100 or ISO 9001 audit experience
Lean manufacturing or Six Sigma certification
Experience mentoring or training junior machinists
SolidWorks or similar CAD proficiency
Experience with probing and in-process inspection
Comprehensive health, dental, and vision insurance
Paid time off and holidays
Overtime opportunities available (time and a half)
Professional development including certifications and training
Modern CNC equipment and cutting-edge tooling
Startup culture with performance bonuses and growth opportunities
Additional Information
Work Schedule: Monday – Friday, standard business hours. Occasional overtime may be available.
Your Growth Path
This Role Is a Launchpad, Not a Ceiling
Every senior machinist who’s joined RivCut has had a clear path upward. Here’s where this role can take you.
Senior CNC Machinist
You are here. Lead projects, mentor machinists, own the process.
Manage a team. Own scheduling, quality, and output for your cell.
Manufacturing Engineering Manager
Drive process improvements, tooling strategy, and cross-functional engineering.
Director of Operations
Oversee the entire production operation. Capacity planning, P&L, strategic growth.
VP of Manufacturing
Shape the future of the company. Facilities, technology, and team at the highest level.
What We Offer
Startup Rewards for Startup Effort
We’re building something from the ground up. The people who go all-in with us get rewarded — in pay, in growth, and in ownership of their craft.
$90K–$110K base + performance bonuses. We reward results, not just time in a chair.
Full Benefits
Medical, dental, and vision coverage. We take care of the team that builds this company.
Growth Investment
Paid training, certifications, and conferences. We fund your development because your growth is our growth.
Work Hard, Live Well
Monday–Friday core schedule, PTO, and paid holidays. We go hard during work hours and respect your time outside the shop.
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Worksite address
union city, CA, 94587, US
Who can apply
Review the original listing for work authorization, qualifications and employer requirements.