Case Study: Sunstone Partners (private equity firm) streamlines HR, payroll and benefits with ADP TotalSource (ADP)

Sunstone Partners on ADP TotalSource® A trusted and collaborative HR partner

Sunstone Partners, a San Mateo–based private equity firm that invests in technology‑enabled services, grew rapidly from 14 to 27 employees and relied on CFO Jennifer Gunn to handle HR and administration. The firm struggled with a previous PEO that was inflexible and uncollaborative—Sunstone couldn’t enter its own payroll, faced excessive paperwork, and was limited by an inadequate benefits platform.

In early 2021 Sunstone switched to ADP TotalSource, gaining self‑service payroll, Fortune‑500 caliber benefits, a dedicated implementation consultant and HR business partner, and an intuitive reporting platform. The change cut paperwork, saved time and money, improved onboarding and remote‑employee compliance, and delivered measurable ROI—so much so that ADP TotalSource is now Sunstone’s recommended provider for portfolio companies.

Sunstone Partners

Jennifer Gunn

Chief Financial Officer