Machining Apprentice, Additive Manufacturing

torrance, ca

About the role

Machining Apprentice, Additive Manufacturing - Castelion Corporation | Career Page Machining Apprentice, Additive Manufacturing Torrance, California, United States Apply for Position Or refer someone Job Openings Machining Apprentice, Additive Manufacturing About the job Machining Apprentice, Additive Manufacturing 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. Machining Apprentice, Additive Manufacturing The Machine Shop Apprentice supports daily machine shop operations by maintaining a clean, organized, and efficient work environment. This role assists machinists, programmers, and manufacturing personnel with machine maintenance, material preparation, secondary operations, and general shop support activities. The position also includes operation of support equipment such as 3D printers, waterjets, and saws.

Responsibilities Shop Maintenance & Organization Maintain shop cleanliness and organization in accordance with 5S standards. Clean CNC machines, workstations, and common areas. Fill and monitor machine oils, coolant, and other consumables as directed. Empty chip bins and assist with routine housekeeping activities. Organize tools, fixtures, raw materials, and shop supplies. Support inventory management and material handling activities. Production Support Assist machinists with machine setups and changeovers. Load and unload raw materials and finished parts. Deburr, clean, inspect, and package machined components. Transport materials, tools, and fixtures between departments. Assist with basic quality checks and documentation as directed. Support production activities to help meet delivery schedules. Equipment Operation Operate and maintain 3D printers, including material loading, print setup, and part removal. Operate waterjet cutting equipment following established work instructions. Operate band saws and other cutting equipment to prepare raw materials. Perform basic preventive maintenance on assigned equipment. Report equipment issues, maintenance needs, or safety concerns promptly. General Support Follow all company safety policies and procedures. Maintain a safe and organized work environment. Assist manufacturing, engineering, and machine shop personnel as needed. Participate in continuous improvement and efficiency initiatives. Perform other duties as assigned. Basic

Qualifications High school diploma or equivalent. Mechanical aptitude and willingness to learn manufacturing processes. Ability to use basic hand tools and measuring devices. Ability to follow written and verbal instructions. Strong attention to detail and organizational skills. Ability to lift up to 50 lbs and stand for extended periods. Preferred Skills and Experience Previous experience in a machine shop or manufacturing environment. Experience operating saws, waterjets, CNC equipment, or 3D printers. Familiarity with shop safety practices and 5S principles. Forklift certification (or ability to obtain certification).

Benefits 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, burnout doesn't Company Paid Holidays: Ten (10) company paid holidays Medical: 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 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 Retirement: 401k plan offered to support long term financial growth along side high-impact, high-velocity 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 company-covered meals when extra time or effort is required Snacks & Beverages: Fully stocked kitchen with unlimited snacks and drinks to keep you fueled throughout the day Performance & Fitness: $100 monthly fitness stipend to support peak performance and health, both inside and outside of work EV Charging: Onsite electric vehicle charging available for employees Physical Demands Frequently stand, walk, bend, lift, and carry materials. Ability to safely lift and move materials up to 50 lbs. Work around machinery, cutting fluids, metal chips, and industrial equipment. Use appropriate personal protective equipment (PPE) at all times. ITAR

Requirements To conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State. This position may require access to classified information or restricted U.S. Government sites, systems, or information, as determined by the Company and/or applicable U.S. Government

requirements. If the position is so designated, your employment in

the role may be contingent upon your ability to obtain and maintain the required U.S. Government security clearance or other government authorization, and to satisfy any citizenship or other eligibility

requirements imposed by applicable law, regulation, executive order, or government contract

requirements. You will be notified if and when such

requirements apply. Failure to obtain or maintain any required clearance or authorization may result in reassignment, leave, or separation from employment, consistent with business needs and applicable law. Affirmative Action/EEO Statement Employment with Castelion is governed on the basis of competence and

qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status. Other Duties Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or

responsibilities that are required of the employee for this job. Duties,

responsibilities and activities may change at any time with or without notice. Apply for Position Or refer someone Share Facebook Line LinkedIn X (Formerly Twitter) Whatsapp Email Powered by Manatal

About Castelion

Castelion is a modern defense production company building long-range hypersonic strike systems to address a critical national security gap. Founded in 2021, Castelion was created in response to the recognized need for the United States to rapidly develop hypersonic capabilities to remain competitive with near-peer adversaries and deter future conflicts.

The company operates under the philosophy of "Peace through Deterrence" — building the weapons systems that ensure conflicts never need to happen. Castelion is one of the few companies in the hypersonics space that has moved beyond concepts to actual production deliverables, with government contracts across multiple branches of the military and a $23M+ Navy order for 50 units in calendar year 2027.

Backed by over $469M in funding from top-tier investors including Andreessen Horowitz, Lightspeed Venture Partners, and General Catalyst, Castelion is scaling rapidly. The company is building what it anticipates will become the preeminent hypersonics campus in the country — including a $150M, 1,000-acre solid rocket motor manufacturing facility in Rio Rancho, New Mexico, alongside its headquarters in Torrance, California.

Castelion's culture is defined by technical excellence, ownership, and velocity. Engineers own meaningful subsystems on the vehicle and are responsible for driving their success. The company follows a responsible engineering model inspired by SpaceX, where individuals choose the highest-value work and are empowered to cultivate resources and partnerships to deliver results. The engineering bar is exceptionally high — attracting elite talent who want to be surrounded by other elite talent.

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Job details

Location

torrance, ca

Company

NameCastelion
Industrydefense, hardware, manufacturing
Team Size300

Funding

Total raised

$464M

Last stage

Growth

Investors

AAltimeter Capital
Lightspeed Venture Partners
Andreessen Horowitz
General Catalyst
LLavrock Ventures

Founders

Bryon Hargis

Bryon Hargis

Co-Founder & CEO

LinkedIn
SP

Sean Pitt

Co-Founder & COO

AK

Andrew Kreitz

Co-Founder & CFO

What happens next.

No applications, no recruiter spam. Just the intro.

01

Confirm the fit

A few questions to make sure this role is the right shape for you. Two minutes.

02

I pitch you to the company

I write the intro, send it to the founder, and handle the back-and-forth.

03

A meeting lands on your calendar

If they’re a yes, I book the chat. You show up — that’s the whole job-hunt.