Physical Security Specialist
Confirmed on the employer's own hiring board on Nov 10, 2026. First seen by Alion on Nov 5, 2026.
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, ownership, and excellence are decisive advantages - and we're building a world-class team to turn bold ideas into real capability.
This is a rare opportunity to join at an early stage, where you'll have significant ownership, collaborate with exceptional teammates, and make a direct, measurable impact on our mission and the future of the company - regardless of your function.
Physical Security Specialist
The Security Specialist on the Physical Security team at Castelion is responsible for protecting personnel, facilities, technology, and controlled information through access control, visitor management, credentialing, and security operations. In this role, you will serve as the primary point of contact for facility entry, support compliance with export control requirements, monitor security systems, and maintain a secure operating environment. This position offers the opportunity to directly support the protection of advanced defense technologies while contributing to the growth of Castelion’s security program.
Responsibilities
- Serve as the primary access control authority for employees, visitors, contractors, and vendors entering Castelion facilities.
- Process visitors, validate access authorizations, coordinate host notifications, and ensure compliance with export control and company security requirements.
- Produce, issue, maintain, and account for employee, contractor, and visitor credentials and badge media.
- Monitor access control, CCTV, intrusion detection, and alarm systems and appropriately document and escalate security incidents.
- Maintain visitor, credential, and security records while supporting audits, compliance activities, and physical security program requirements.
Basic Qualifications
- High school Diploma or GED.
- 2+ years of experience in physical security, access control, visitor management, reception, customer service, military, or a related field.
- Experience verifying identities, credentials, and access authorizations.
- Strong written and verbal communication skills with the ability to interact professionally with employees, visitors, and senior leaders.
- Experience using computers and standard business software applications to maintain records and documentation.
Preferred Skills and Experience
- Experience in aerospace, defense, manufacturing, technology, critical infrastructure, or government environments.
- Experience operating visitor management systems, access control systems, CCTV platforms, and alarm monitoring systems.
- Experience issuing and managing employee, contractor, and visitor credentials.
- Familiarity with International Traffic in Arms Regulations (ITAR), Controlled Unclassified Information (CUI), or export-controlled environments.
- Experience supporting front desk, lobby operations, security operations, or credentialing programs.
Additional Requirements
- Ability to put in extended hours, including evenings and weekends, when required to meet aggressive timelines.
- This role is based in Allen, TX and requires full-time onsite presence.
- Ability to maintain professionalism while enforcing security requirements and denying access when necessary.
- Ability to manage multiple priorities in a fast-paced operations environment.
- Must be able to pass a background investigation and any required pre=employment screening.
Physical Demands
- Ability to sit and stand for extended periods of time.
- Ability to occasionally move throughout office, manufacturing, and warehouse environments.
- Ability to occasionally lift and move items up to 40 pounds.
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.
Castelion offers a generous benefits package. Please refer to the bottom of our Careers page for more details.
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.
Additional Eligibility Requirements
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.
Affirmative Action/EEO Statement
Castelion is an Equal Opportunity Employer. We are committed to providing equal employment opportunities to all applicants and employees without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, genetic information, protected veteran status, or any other characteristic protected by applicable federal, state, or local law.
Castelion is committed to providing reasonable accommodations to qualified individuals with disabilities throughout the application and hiring process. If you require a reasonable accommodation to complete an application, participate in the interview process, or otherwise participate in the hiring process, please contact [email protected]. Requests for accommodation will be considered on an individual basis and handled in accordance with applicable law.
Castelion is committed to fostering a workplace where employment decisions are based on qualifications, business needs, and the ability to perform the essential functions of the role, with or without reasonable accommodation.
EAR/ITAR Requirements
This position requires access to export-controlled information, and as such, employment (or hiring of a contractor) is contingent upon the candidate’s ability to access all applicable export-controlled information without additional export licensing being required by the Bureau of Industry and Security and/or the Directorate of Defense Trade Controls.