Snelling connects Great People with Leading EmployersAnd Employers seeking Great PeopleSnelling-St Louis has been one of the leading professional Staffing agencies in St Louis, Mo for decades. That's why in St. Louis, MO..... Snelling means Staffing. We pride ourselves in providing "The Right Fit" - an individual who can contribute to your company's success. Call Snelling Staffing. Snelling has been one of the leading temporary staffing agencies in St. Louis MO since the 1950's and our Snelling office in St Louis was established over 25 years ago. So for the best results, call Snelling first. We can do the complete process for you or provide you with a selection of services that best fit your needs.