Welcome to CornerStone Staffing, one of the leading staffing agencies in Frisco, TX. Best in Staffing Service. Best in Career Placement. The Best Choice for You! CornerStone Staffing – Frisco is located in the Frisco Bridges building on the corner of Dallas Parkway & Texas Rangers Drive, ½ mile north of the Ikea Store. The Frisco team of experienced recruiters is ready to find and qualify top of the line candidates for your clerical, customer service, finance and accounting staffing needs while providing quality customer service for a positive staffing experience.