Featured Careers
Shape the Future
With Us
We’re grateful for the strong interest in Project Ranger. We’ve received an incredible response from New Mexico applicants, which we’re currently reviewing. We look forward to connecting with candidates in the coming weeks.
Open Positions
Protecting Yourself from Recruitment Scams
Castelion will never contact candidates from Gmail or other personal email accounts, all official communication will come from the @castelion.com domain, and candidates should verify they are speaking with a real Castelion representative.
Why
Join Us?
Working at Castelion isn’t for everyone. The hours can be long. We test in blistering heat, freezing cold, and pouring rain. And when something breaks, we learn fast, adapt, and push forward—without losing momentum.
We do this because the mission demands it. Because every person here is driven to master their craft and outpace the competition. Because America needs a new generation of builders to keep it safe.
At Castelion, you won’t just contribute—you’ll own. You’ll work hands-on with real flight hardware and shape systems that matter. The challenge is real. Are you ready?
Explore Our Benefits
Company Equity
All employees are granted long-term stock incentives as part of their employment as Castelion.
Medical
To support the people building our next-generation of hypersonic systems, we offer plans at 100% employee covered and 80% of dependent coverage.
Dental & Vision
We cover 90% employees and 80% for dependents to ensure you and your family have access to quality preventive and ongoing care.
Membership-Based Care Practice
Convenient, high quality primary care that offers fast access to same day appointment, 24/7 virtual visits and seamless insurance integration, making it easier to prioritize wellness with minimal wait times and a tech friendly experience.
FSA / 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 care expenses.
Financial Infrastructure (401k)
401k plan offered to support long term financial growth along side high-impact, high-velocity work.
Personal Time Off
Four (4) weeks of paid time off to unplug, reset, and come back sharp—velocity matters, burnout doesn’t.
Company Paid Holidays
Ten (10) company paid holidays.
Paid Parental Leave
We support growing families with meaningful time to bond and recover. Birthing parents are eligible for up to ten (10) weeks of paid leave, while non-birthing parents may take up to four (4) weeks of paid leave.
Concierge Leave Support
Personalized, hands-on support throughout the leave process, assistance with navigating paperwork, understanding benefits, and reducing stress to support focus on health, family, and well-being.
Life & Voluntary Life Insurance
Financial protection for you and your loved ones through employer-provided and optional supplemental life insurance coverage.
Short & Long Term Disability
Income replacement benefits that help protect your earnings if you’re unable to work due to a qualifying illness or injury.
Emergency Care
Supplemental coverage that provides cash benefits to help offset out-of-pocket expenses resulting from a covered accident.
Fuel & Ops Support
Frequently catered lunches and meals to support any dedicated time after hours. Comp’d meals when asked to go the extra mile. Unlimited snacks and beverages.
Performance Conditioning
$100 fitness stipend to support peak performance and health inside and outside of work.
EV Charging
Convenient cost free access to on-site electric vehicle charging to support sustainable commuting.
On-Site Lunch & Snacks
Enjoy free lunch Tuesdays and Thursdays as well as a fully-stocked kitchen with food and beverages.