ADP, also known as Automatic Data Processing, is "one of the world's largest providers of business outsourcing solutions. Leveraging over 60 years of experience, ADP offers a wide range of HR, payroll, tax and benefit administration solutions from a single source." These services give them vast insight into national employment, and changes in national employment.
Much like Challenger, Gray, & Christmas, they collate this information into a monthly snapshot of the US employment situation. ADP focuses entirely on the private sector, however, because that's what they work with.
In February, they reported a seasonally adjusted employment increase of 217,000 jobs. Looking at the March report, we see two things right away: First of all, private-sector non-farm employment increased by 201,000 in March on a seasonally adjusted basis. Secondly, February's job growth was revised downwards to 208,000.
164,000 (75.57%) of those new jobs came from the service-providing sector and 37,000 (18.4%) came from the goods-producing sector. Large businesses were responsible for 17,000 (8.45%) of the new jobs, medium-size businesses for 82,000 (40.8%), and small businesses for 102,000 (50.7%).
 From ADP's web site.