Questa Source, LLC, now part of Quadrant, Inc. is a full service temporary staff augmentation firm headquartered in Reston, Virginia providing our clients with a "rapid fire" approach in staffing technology and HR positions, while providing a variety of cost effective solutions. • Contract/Temporary Staffing • Contract to Hire (no buyout fees) • Contingency Staffing Questa Source, LLC provides full life cycle staff augmentation services for both national and regional companies in the growing Washington, D.C. metropolitan market. Our customers have come to include some of the largest and most recognized brand named companies within the Federal, DOD, Cyber, Commercial and Healthcare sectors, who are hiring a mix of Technology, Healthcare and HR professionals on a contract and contract to hire basis.