Office Manager

Castelion Corporation•Washington, DC

54d•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.)

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