Strategic Social Media Lead for National Security Tech

Castelion Corporation; Torrance (CA); On-site; USD 100,000 - 160,000; Full time

Job summary

Castelion is seeking a Manager, Social Media & Strategic Communications to lead Castelion's presence across LinkedIn, X, YouTube, Instagram, and emerging platforms. You will translate Castelion's mission, milestones, and leadership perspective into high-impact content for defense, policy, investor, and talent audiences.

The role requires sharp writing, fast execution, and strong judgment in a national-security environment.

Qualifications

• 4-7 years of experience in social media, strategic communications, public affairs, journalism, defense communications, technology communications, or a related field.
• Proven ability to manage brand and executive social channels, especially LinkedIn and X.
• Exceptional writing and editing skills, with the ability to craft concise, compelling content under tight deadlines,
• Strong fluency of social media strategy, latest trends, audience engagement, social listening, and performance analytics to iterate and constantly improve.
• Ability to translate technical or complex subject matter into clear, accurate, engaging messaging.
• Willingness to travel as needed for events, media opportunities, launches, tests, and industry conferences.

Responsibilities

• Develop, execute, and own Castelion's social media strategy across social channels, including X, LinkedIn, YouTube, Instagram, and other priority platforms.
• Plan the editorial calendar for company channels, including announcements, milestones, recruiting content, executive perspective, industry commentary, event coverage, and evergreen brand storytelling.
• Draft, edit, schedule, and publish social content that is technically accurate, visually compelling, and appropriate for defense, policy, customer, investor, and talent audiences.
• Build social-first campaigns around major company announcements, product milestones, test activity, launch activity, executive appearances, industry events, and recruiting priorities.
• Partner with creative, design, video, engineering, and recruiting teams to develop visual assets, short-form video concepts, carousels, explainers, and behind-the-scenes content.
• Support executive social presence, including drafting posts, shaping point of view, identifying timely moments, and translating leadership perspective into credible public commentary.
• Monitor defense, aerospace, technology, policy, competitor, and geopolitical conversations to identify relevant moments for Castelion to engage or avoid.
• Produce concise daily executive media and social brief summarizing relevant coverage, industry developments, competitor activity, social conversation, geopolitical events, and emerging narratives.
• Track channel performance, audience growth, engagement, sentiment, and campaign results, then use those insights to improve content strategy.
• Manage community engagement, comment monitoring, inbound message routing, and escalation workflows.
• Support media strategy for announcements and high-visibility moments, including drafting press materials, talking points, briefing notes, media pitches, and social amplification plans.
• Help identify high-quality podcasts, interviews, conferences, speaking opportunities, and other visibility moments for company leadership
• Support rapid-response communications and issue management with discretion, accuracy, and sound judgment.
• Maintain consistency of Castelion's external voice, messaging, terminology, and narrative across social, press, web, recruiting, and executive channels.
• Coordinate with legal, security, engineering, and business stakeholders to ensure communications meet OPSEC, export-control, customer-sensitivity, and technical-accuracy standards.
• Staying ahead of ever-changing platform algorithms, feature updates, and best practices across our existing platforms.
• Strong understanding of platform-specific creative requirements, including image dimensions, video specifications, aspect ratios, safe zones, and publishing best practices.

Skills

Social media

Strategic communications

Public affairs

Journalism

Defense communications

Technology communications

Writing & editing

Stakeholder collaboration

Tools

LinkedIn

X (Twitter)

YouTube

Instagram

Analytics tools

Job description

Castelion is seeking a Manager, Social Media & Strategic Communications to lead Castelion's presence across LinkedIn, X, YouTube, Instagram, and emerging platforms. You will translate Castelion's mission, milestones, and leadership perspective into high-impact content for defense, policy, investor, and talent audiences.

The role requires sharp writing, fast execution, and strong judgment in a national-security environment.