Manufacturing Engineer, Chemical Vapor Deposition

Why Castelion, Why Now

Castelion is moving incredibly fast to develop and deliver advanced defense systems at a time when execution matters more than ever. We believe focus and technical excellence are decisive advantages - and we are building a team that can deliver real capability, not just concepts

.This is a rare opportunity to join at an early stage, where your work will directly shape critical systems, influence major technical decisions, and have immediate, real-world impact

on
Castelion is seeking a highly motivated Manufacturing Engineer to support development, operation, and scale-up of our chemical vapor deposition (CVD) manufacturing systems. This role is focused on building, modifying, troubleshooting, and operating production equipment used to manufacture ceramic matrix composite (CMC) materials for high-performance thermal protection syste

ms.
This is a hands-on engineering role for someone who enjoys working directly with hardware. The ideal candidate has experience designing, building, testing, and troubleshooting mechanical systems through internships, manufacturing experience, Formula SAE, Baja SAE, rocketry, robotics, motorsports, machine shop projects, or other highly hands-on engineering progr

ams.

The successful candidate will spend significant time on the production floor working with reactor systems, tooling, instrumentation, and manufacturing equipment while partnering with materials, design, and production teams to improve reliability, throughput, and manufacturabil

• ities
  Design, build, assemble, and test modifications to CVD reactor systems and supporting equi
• pment.
  
  Support daily reactor operations, development testing, and manufacturing activ
• ities.
  
  Troubleshoot mechanical, electrical, vacuum, thermal, and process-related equipment i
• ssues.
  
  Perform and coordinate preventative and corrective maintenance activities to maximize equipment u
• ptime.
  
  Collect and analyze test and production data to drive equipment and process improve
• ments.
  
  Develop manufacturing work instructions, standard operating procedures (SOPs), maintenance procedures, and nonconformance document
• ation.
  
  Support installation, commissioning, and qualification of new manufacturing equi
• pment.
  
  Work closely with technicians and engineers to rapidly identify and resolve production i
• ssues.
  
  Execute engineering projects from concept through implementation in a fast-paced development enviro

• cations
  Bachelor's degree in Mechanical Engineering, Manufacturing Engineering, Aerospace Engineering, Chemical Engineering, or relate
• d field.
  
  Demonstrated hands-on engineering experience designing, building, testing, or troubleshooting h
• ardware.
  
  Comfortable using hand tools, power tools, measurement equipment, and basic fabrication eq
• uipment.
  
  Strong mechanical aptitude and ability to diagnose and solve equipment p
• roblems.
  
  Ability to work independently in a fast-paced manufacturing envi
• ronment.
  
  Willingness to work off-shift hours when required to support testing or production ope

• xperience
  Formula SAE, Baja SAE, collegiate rocketry, robotics competition, motorsports, machine shop, or equivalent hands-on engineering e
• xperience.
  
  Experience with vacuum systems, thermal processing equipment, furnaces, reactors, or other industrial
• equipment.
  
  Experience with CAD design, mechanical fabrication, and engineering
• drawings.
  
  Experience supporting manufacturing equipment, automation systems, or production o
• perations.
  
  Familiarity with root cause analysis, process improvement, and equipment reliability meth

• s And Perks
  Employee Equity:
  Meaningful equity for all full-time employees - share value has increased 150x in
• three years
  
  Personal Time Off:
  Four (4) weeks of paid time off to unplug, reset, and come back sharp—velocity matters, bur
• nout doesn’tCompany Paid Holidays:
  Ten (10) company p
• aid holidays
  
  Medical:
  We offer plans at 100% employee covered and 80% of depend
• ent coverage
  
  Dental & Vision:
  We cover 90% employees and 80% for dependents to ensure you and your family have access to quality preventive and
• ongoing careFSA/HSA:
  To support long-term health and financial resilience, we offer FSA and HSA options that allow employees to set aside pre-tax dollars for eligible medical and dependent c
• are expenses
  
  Retirement: 401k plan offered to support long term financial growth along side high-impact, high-v
• elocity work
  
  Paid Parental Leave:
  We support growing families with meaningful time to bond and recover. Birthing parents are eligible for up to 10 weeks of paid leave, while non-birthing parents may take up to 4 weeks of paid leave. This time can be used for pre-natal care, pregnancy, childbirth, and related medical needs—ensuring every parent has the support they need during this important life moment.
  8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for
• CA employees
  
  Meals & Catering:
  Frequently catered lunches and team meals, plus…