ADP TotalSource is a versatile platform providing a range of employee management services. Its payroll software is extremely powerful, offering a suite of advanced tools and streamlined integrations.

ROSELAND, NJ--(Marketwired - Sep 2, 2015) - ADP TotalSource®, the largest Professional Employer Organization (PEO) in the United States with more than 387,000 co-employed worksite employees, today ...

ROSELAND, NJ--(Marketwired - Jan 31, 2018) - ADP TotalSource®, the largest certified* Professional Employer Organization (PEO) in the United States, today announced that it now co-employs more than ...