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Administrative Assistant Support - Herndon, VA

Omniplex
United States, Virginia, Herndon
Mar 24, 2026
- POSITION SUMMARY Provides comprehensive administrative support to the Three Rivers Program Management Office. Administrative Assistant Support include coordinating meetings and events, managing data, delivering training, and preparing documents, spreadsheets, and presentations. The ideal Administrative Assistant Support candidate demonstrates strong attention to detail and excellent communication skills. RESPONSIBILITIES Track, analyze, and report data accurately and in a timely manner, communicating results effectively. Assist with the timely processing of vendor invoices. Maintain and update multiple Excel trackers. Support field personnel by providing information and connecting them with appropriate back-office departments. Generate Costpoint requisitions and serve as a Subject Matter Expert on Costpoint Requisitioning and Receiving, providing training to field personnel as needed. Support onboarding for the program management team, guiding new hires through the process. Schedule medical appointments for all new hires. Review and process clearance paperwork for program submission. Perform other duties as assigned. WORKING CONDITIONS In-person office environment with frequent interruptions. Standard business hours: Monday-Friday, 8:00 am-5:00 pm. PHYSICAL REQUIREMENTS May lift and carry items up to 25 lbs. Intermittent standing, walking, sitting, squatting, stretching, and bending throughout the workday. QUALIFICATIONS High school diploma or equivalent. Self-motivated, organized, and highly detail-oriented. Proactive with the ability to take initiative. Skilled at multitasking and prioritizing competing tasks. Able to work independently and collaboratively within a team. Eager to research, learn independently, and master new systems. Capable of fostering and maintaining cooperative working relationships. Willingness to become a Subject Matter Expert in new applications, create procedural documentation, and train others. Maintains confidentiality of sensitive information. Proficient in Microsoft Excel, Word, and PowerPoint at an intermediate level. Preferred Clearance Level. BENEFITS Constellis offers a comprehensive, total rewards package that includes competitive compensation and a flexible benefits package that reflects its commitment to creating a diverse and supportive workplace. - Constellis provides end-to-end risk management and comprehensive security solutions to safeguard people and infrastructure. Operating globally and based in the Washington D.C. area, our employees bring unparalleled dedication and passion for creating a safer world while upholding the highest standards of compliance, quality, and integrity. As a leading global provider of risk management, security, humanitarian, training and operational support services to government and commercial customers, Constellis' solutions include a range of services, including background investigations, social intelligence tools, advanced training, logistics and life support, UAV and K9 services, and crisis response mitigation. At Constellis, our number one priority is to secure success for our customers. EEOC Statement Constellis and its affiliated companies are equal opportunity employers. All applicants receive consideration without regard to race, color, sex, age, ethnicity, religion, national origin, disability, veteran status or any other characteristic prohibited by federal, state, or local law.