Welcome to CornerStone Staffing-Tempe. Best in Staffing Services. Best in Career Placement. The Best Choice for You! Our collective team of more than 50 professionals has amassed more than 300 years of experience in the staffing industry – and we are experts at sourcing candidates. Whether you are an applicant or a client searching for a candidate to fill your needs, our tenured staff is committed to making the best clerical, customer service or accounting placement possible. CornerStone Staffing-Tempe is located just south of Tempe off I-10 and West Ray Road.