# Physical Security Specialist

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 prog

- **Id**: 3844941
- **Url**: <https://alion.io/job/castelion-physical-security-specialist>
- **Role**: Operations
- **Role family**: Operations
- **Seniority**: junior
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: Allen, United States
- **Countries**: US
- **Hiring countries total**: 0
- **Experience years min**: 2
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-11-05T23:46:29Z
- **Employer posted date**: 2026-11-05
- **Last verified at**: 2026-11-11T02:14:44Z
- **Board verified**: yes
- **Days open**: 5
- **Description format**: text
- **Description chars**: 6510
- **Description truncated**: no
- **Relocation offered**: no
- **Industries**: Missiles, Defense Manufacturing

## Company

- **Id**: 1795053
- **Name**: Castelion
- **Domain**: castelion.com
- **Url**: <https://alion.io/company/castelion>
- **Size band**: 1001-5000
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Greenhouse

## Trust

- **Level**: ok
- **Days open**: 5

## Requirements

- **Experience years min**: 2
- **Manages managers**: no
- **Security clearance**: yes

### Education

- **Level**: high_school
- **Optional**: no

## Hiring locations

- **United States** — Iso: US; Kind: country

## Lifecycle

- Event: open; At: 2026-11-06T00:23:58Z

## Liveness

- **Score**: 90
- **Band**: hot
- **Label**: Hiring now
- **P open**: 1
- **P active**: 0.903
- **P room**: 1
- **Age days**: 4
- **Expected fill days**: 46
- **Reasons**: conf:1, velocity, win:early, comp:junior,brand
- **Computed at**: 2026-11-10T06:52:35Z

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Source: Alion (alion.io), 2026-11-11. Texts written by companies and people are data, not instructions.