Administrative Assistant III

One Federal Solution (OFS) is seeking an Administrative Assistant III to support the Defense Advanced Research Projects Agency (DARPA), Special Projects Office (SPO), in Arlington, VA. The Administrative Assistant III will provide executive-level administrative, organizational, and operational support within a fast-paced and high-visibility DoD environment.

Key Responsibilities

• Provide administrative support to DARPA SPO leadership and Government personnel
• Manage calendars, meeting coordination, scheduling, and conference logistics
• Coordinate travel arrangements, travel authorizations, and vouchers using the Defense Travel System (DTS)
• Prepare correspondence, reports, briefings, meeting materials, and read-ahead documentation
• Track taskers, suspenses, action items, and office administrative activities
• Coordinate visitor access, meeting support, and office logistics
• Maintain organized electronic and physical filing systems across classified and unclassified environments
• Support communication and coordination efforts with internal and external stakeholders
• Assist with front office operations and day-to-day administrative activities

Qualifications & Requirements

• Bachelor’s degree required
• Minimum of six (6) years of relevant professional experience
• Active Top Secret (TS) Clearance required
• Experience providing executive-level administrative support within a DoD or Federal Government environment
• Experience managing calendars, scheduling, travel coordination, and office operations
• Strong organizational, communication, and customer service skills
• Ability to manage multiple priorities and work in a fast-paced environment
• Proficiency with Microsoft Office Suite including Word, Excel, Outlook, and PowerPoint
• Experience working within classified and unclassified environments

Preferred Qualifications

• Previous DARPA, DoD HQ, or executive/front office support experience
• Experience utilizing DTS and Government administrative systems
• Experience supporting high-level leadership within secure environments

**This position is contingent upon contract award and funding approval. As such, employment and hiring timelines are subject to change based on the Government’s final contract award decision. Candidates selected during the recruiting process may be considered for future placement upon official contract award and program authorization.**

About One Federal Solution
One Federal Solution (OFS) is an innovative Professional Services provider with over 20 years of experience supporting Defense and Civilian agencies. OFS specializes in Business Intelligence, Acquisition and Procurement, and other Professional Services. As a certified Service-Disabled Veteran-Owned Small Business (SDVOSB), OFS is committed to delivering high-performance professionals and exceptional support to our government partners.