Office Manager

Castelion Corporation • Washington, DC

13d • Onsite

About The Position

We are seeking a highly organized, proactive Office Manager to own the day-to-day operations of Castelion's Washington DC office, which serves as a key hub for customer engagement, executive meetings, and external events. This role is responsible for ensuring the office runs smoothly, professionally, and reliably. This is not a traditional administrative office role this position is critical to shaping the first impression of Castelion for customers, partners, and stakeholders. You will manage operations, logistics, and experience within a high-visibility environment that frequently hosts important meetings, briefings, and events. The ideal candidate is detail-oriented, operationally strong, and thrives in fast-paced environments where expectations for professionalism, responsiveness, and execution are high.

Requirements

• 3+ years of experience in office management, operations coordination, facilities support, or related roles
• Strong organizational and multitasking skills with the ability to manage competing priorities
• Experience managing vendors, service providers, or operational workflows
• Familiarity with shipping/receiving processes and basic logistics coordination
• Strong communication and interpersonal skills, with experience supporting executives, customers, or external guests
• Proven ability to operate independently with high attention to detail and accountability
• Comfortable working in a fast-paced environment with frequent last-minute changes and high expectations
• Proficiency with standard office tools (Microsoft Office, Google Workspace, scheduling tools, etc.)
• U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
• The ability to obtain and maintain a U.S. government–issued security clearance is required.

Nice To Haves

• Experience supporting executive offices, customer-facing environments, or high-visibility corporate spaces
• Background in facilities coordination, workplace operations, or logistics coordination
• Experience managing events, briefings, or customer visits in a professional setting
• Familiarity with EHS processes, security protocols, or controlled-access environments
• Experience working in aerospace, defense, industrial, or similarly regulated organizations
• Experience supporting small, high-performance teams in fast-growing companies
• Budget tracking or light financial administration experience
• Strong sense of ownership over physical space, logistics flow, and workplace experience

Responsibilities

• Own daily office operations, maintaining a clean, organized, and high-functioning environment
• Prepare and manage the office for customer visits, executive meetings, and hosted events, ensuring a seamless experience
• Coordinate meeting and event logistics end-to-end, including scheduling, setup, and execution
• Manage vendor relationships (janitorial, maintenance, catering, security), ensuring high-quality and timely service
• Oversee shipping and receiving, including handling, tracking, and distribution of mail, packages, and equipment
• Partner with EHS and security to uphold site protocols, visitor access procedures, and safe operations
• Maintain inventory of office supplies, equipment, and materials to ensure operational readiness
• Coordinate maintenance needs, addressing minor issues directly and escalating as appropriate
• Establish and uphold office procedures and SOPs to drive consistency and efficiency
• Ensure the office environment reflects a high standard of professionalism and aligns with Castelion's brand
• Track and manage office-related expenses and budgets
• Continuously identify and implement improvements to enhance office operations and overall workplace experience

Benefits

• Meaningful long-term equity, sharing in the company's significant growth trajectory
• Four (4) weeks of paid time off
• Ten (10) company-paid holidays
• Comprehensive health benefits - including 100% employee-covered medical and strong dependent coverage, along with dental and vision plans
• Paid parental leave
• $100 monthly fitness stipend
• Onsite EV charging
• Catered meals
• Company-covered food during high-demand periods
• Fully stocked kitchen

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed