Office Administrator, Arlington

Job Title
: Office Administrator
Industry
: Professional Services / Consulting
Location:
Washington, DC (100% In Office)
Assignment Type
: Direct Hire
Pay
: $85,000 $105,000 / Year (depending on experience)
Work Schedule:
MondayFriday, 9:00 AM 5:30 PM with flexibility required during peak business periods and events.
Benefits:
This position is eligible for medical, dental, vision, and 401(k).
About Our Client:
Addison Group is partnering with a highly respected professional services firm in Washington, DC to identify an experienced Office Administrator.
This organization offers a polished, fast-paced environment with strong leadership visibility and a collaborative team culture.
They are seeking a long-term addition to the team who can serve as a trusted administrative and operational partner while helping maintain a high standard of professionalism across the office.
Job Description:
The Office Administrator will serve in a multifaceted role supporting senior leadership, office operations, finance administration, and event coordination.
This individual will play a key role in ensuring day-to-day business functions run efficiently while also supporting high-level meetings, travel coordination, special projects, and large-scale company events.
The ideal candidate is highly organized, resourceful, proactive, and comfortable operating within a professional services environment supporting executives and internal teams alike.
Key Responsibilities:
Provide high-level calendar management and scheduling support for senior leadership, including coordination with external stakeholders and executive offices
Coordinate domestic and international travel arrangements, including itineraries, transportation, lodging, and schedule management
Prepare and process expense reports and provide administrative support for special projects and operational initiatives
Assist with bookkeeping functions including invoicing, accounts receivable, accounts payable, deposits, and reconciliation support
Maintain vendor agreements, renewal schedules, and payment tracking to ensure deadlines are met
Support office operations by managing supplies, vendor relationships, facilities coordination, and communication with building management
Help facilitate onboarding and offboarding processes, including coordination with internal operations and technology partners
Maintain organization of shared administrative systems, calendars, documentation, and office resources
Coordinate internal meetings, staff communications, and team activities to support a collaborative office culture
Assist in planning and executing company events including client gatherings, team outings, dinners, fundraisers, and large annual events
Manage event logistics including vendor coordination, guest tracking, timelines, seating coordination, onsite execution, and post-event follow-up
Create and maintain operational documentation, templates, checklists, and administrative procedures to improve efficiency and consistency
Qualifications:
10+ years of administrative, office management, and executive support experience within a professional services environment required
Previous experience supporting senior executives and managing complex scheduling and travel coordination
Must have experience directly supervising at least one administrative employee
Strong background in office operations, bookkeeping, invoicing, expense management, and vendor coordination
Hands-on experience planning and supporting corporate events ranging from internal meetings to large-scale functions
Proficiency with Microsoft Office 365 including Outlook, Excel, Word, and PowerPoint
Strong organizational skills with exceptional attention to detail and follow-through
Ability to handle confidential information with professionalism and discretion
Comfortable managing multiple priorities in a fast-paced environment
Strong communication and interpersonal skills with a proactive, solution-oriented approach
Bachelors degree preferred; equivalent professional experience considered
Perks:
Opportunity to join a highly visible and well-connected professional services organization
Beautiful office environment in a premier DC location
Collaborative and polished team culture
Exposure to executive leadership and high-profile events
Long-term growth potential within a stable organization
Diverse responsibilities offering both strategic and hands-on involvement across operations and events
Addison Group is an Equal Opportunity Employer.
Addison Group provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, gender, sexual orientation, national origin, age, disability, genetic information, marital status, amnesty, or status as a covered veteran in accordance with applicable federal, state and local laws.
Addison Group complies with applicable state and local laws governing non-discrimination in employment in every location in which the company has facilities.
Reasonable accommodation is available for qualified individuals with disabilities, upon request.