Manager, Social Media & Strategic Communications

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.

Manager, Social Media & Strategic Communications

Castelion is building next-generation strike systems to restore credible deterrence and expand the industrial base to strengthen U.S. national security. We are looking for an innovative communicator as a Manager, Social Media & Strategic Communications to lead Castelion's presence and voice across social media channels.

This role is responsible for turning Castelion's mission, technology, milestones, leadership perspective, and culture into high-impact content for defense, aerospace, policy, technology, investor, and talent audiences. The right candidate not only understands how to build momentum on LinkedIn, X, YouTube, Instagram, and emerging platforms, but is an innovative leader in this space. The best candidate can also maintain the judgment required to communicate in a national-security environment.

You will work closely with company leadership, engineering, business development, recruiting, legal, security, and communications to shape social-first narratives around hypersonic systems, advanced effects, missile defense, defense manufacturing, and emerging national-security technologies.

This is a hands-on role for a sharp writer, fast operator, and high-judgment communicator who can move from strategy to execution quickly. The best candidate will be comfortable writing under deadline, building a content calendar, spotting timely narrative opportunities, working with technical stakeholders, and knowing when not to post.

Responsibilities

Basic Qualifications

Preferred Skills and Experience

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 hr@castelion.com. 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.