Medical Staffing Network Healthcare is the largest provider of per diem nurse staffing services in the United States as measured by revenues. The Company also provides travel nurse staffing services and is a leading provider of allied health professionals, such as radiology and diagnostic imaging specialists, clinical laboratory specialists, rehabilitation specialists, pharmacists and respiratory therapists and other similar healthcare vocations. GSN Staffing is destined to become an industry leader in temporary staffing, since it was begun by the creators of Medical Staffing Network, itself a national leader in healthcare staffing, with over 140 offices in 43 states.