Job DescriptionJob Description
About Castelion
Castelion is bringing a new approach to defense development and production: one that focuses on short, iterative design cycles, rapid testing in development, and modern commercial manufacturing strategies for production at scale. We're designing, building, and testing next long range strike weapons systems to give America and its Allies a definitive edge and deter future conflicts.
Senior Electromechanical Control Systems Engineer
We're looking for a Senior Electromechanical Control Systems Engineer to lead the development of control actuation systems (CAS) across our missile programs. In this role, you'll own the design, integration, and validation of servo systems that provide fin control, thrust vector control, and other critical actuation functions. You'll work across mechanical, electrical, and software domains to create reliable, high-bandwidth systems that can survive the harsh realities of flight.
You will be comfortable modeling a servo loop as you are debugging a noisy encoder or optimizing a motor driver. This is a hands-on role with high ownership and real impact. Your systems will be on flight hardware within months - not years.
Responsibilities
Design, model, and implement closed-loop electromechanical control systems (servo loops, fin actuators, thrust vector control, etc.)
Select, integrate, and tune motors, sensors, drivers, and control electronics
Perform detailed dynamic modeling and analysis of control system stability, responsiveness, and robustness
Develop and run bench-level and HWIL testing to verify performance under real-world loads
Partner with GNC, Propulsion, Avionics, and Test teams to ensure end-to-end system integration and flight readiness
Own CAS subsystem reliability and support flight test operations and post-flight analysis
Basic Qualifications
B.S. or M.S. in Mechanical, Electrical, Aerospace Engineering or related discipline
Strong background in electromechanical systems, actuator design, and servo control
Experience with sensors (encoders, resolvers), brushless motors, motor drivers, and embedded control loops
Proficient in MATLAB/Simulink and C/C++ (especially for control implementation and tuning)
Hands-on experience integrating hardware, conducting lab testing, and supporting field deployments
Skills and Experience
Prior experience in missile systems, guided projectiles, or aerospace actuators
Familiarity with thrust vector control, fin actuation, or RCS systems
Knowledge of high-speed real-time control, signal conditioning, and EMI mitigation
Exposure to flight test environments and anomaly resolution
Leadership Qualities
Bias to Action and Creative Problem Solving . Desire and experience questioning assumptions in ways that lead to break through ideas that are ultimately implemented. Successfully bring in applicable
processes/concepts/materials
from other industries to achieve efficiency gains. The ability to personally resolve minor issues in development without requiring significant support.
High Commitment, High Initiative . A successful candidate will have a genuine passion for Castelion's mission and consistently look for ways to contribute to the company's technical goals and prevent hardware blockers. Ability to work in a fast paced, autonomously driven, and demanding atmosphere. Strong sense of accountability and integrity.
Clear Communicator.
Proactively communicates blockers. Trusted in previous roles to be voice of company with regulators, suppliers, gate keepers and customers. Capable of tactfully managing relationships with stakeholders to achieve company-desired outcomes without compromising relationships. Emails, IMs and verbal interactions are logical, drive clarity, and detailed enough to eliminate ambiguity.
ITAR Requirements
To conform to U.S. Government export regulations, applicant must be a (i) U.S. or , (ii) U.S. lawful, permanent (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.
Employment with Castelion is governed on the basis of competence and qualifications and will not be influenced in any manner by , , , , /, veteran status, status, , , , marital status, mental or physical or any other legally protected status.
All employees are granted long-term stock incentives as part of their employment at Castelion. All employees receive access to comprehensive medical, vision, and dental insurance, and the company offers four weeks of paid time off per year.
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Senior Electromechanical Control Systems Engineer