How Jazz Pharmaceuticals achieved payroll accuracy with OSV’s payroll and tax services

Jazz Pharmaceuticals had already decided that outsourcing their HRIS and payroll was the right move. Their small internal team needed to focus on strategic work — not chase down reporting errors or missing W2s. The problem was execution. Their previous providers were making frequent mistakes, and for a global biopharmaceutical company supporting more than 1,800 employees across 13 countries, that level of inaccuracy wasn't sustainable.

Jazz needed a single application and a service partner who could own U.S. payroll and payroll tax compliance without dropping the ball. They chose Workday for the technology and OneSource Virtual (OSV) for the service layer built natively inside it.

With OSV's payroll and tax services, Jazz's two-person payroll team now supports more than 900 bi-weekly payments with confidence. OSV handles the Workday configurations, manages open cases through a dedicated customer success manager, and provides benefits support for employees across the U.S., UK, and Ireland. The result is what Yelena Khaymovich, Jazz’s associate director of payroll, could only describe as something she’s proud of: outstanding payroll tax cases dropped from more than 25 to just two in a single year.

For Jazz, the value of managed payroll services goes beyond accuracy. It's the ability to trust a partner with the challenge of multi-country operations, the configuration of new Workday features, and the employee-facing questions that a small HR team couldn't scale to cover alone. OSV's Workday-native payroll outsourcing model gave Jazz the control they wanted and the expertise they needed.

Download the full case study to see how OSV's payroll and tax services helped Jazz Pharmaceuticals build a payroll operation rooted in accuracy, scalability, and partnership.