Gunderson Dettmer client and HR technology company Justworks announced its $50 million Series E financing. The round of funding was led by Union Square Ventures and existing investor FirstMark Capital. Bain Capital Ventures, Index Ventures, Redpoint Ventures, Spark Capital, and Thrive Capital also participated in the financing.

"Justworks reinvented the PEO (Professional Employer Organization) model by delivering an experience people love," said Isaac Oates, founder and CEO of Justworks, in the company’s announcement of the financing. "The modern workforce expects simplicity and seamlessness in the tools they use and technology that empowers them to do things by themselves. By combining SaaS flexibility, transparent pricing and off-the-shelf functionality with 24/7 expert support for customers and their teams, Justworks provides an unmatched PEO offering for the modern business. This new investment will help us to strengthen these advantages and double down on our growth as the expectations of an increasingly millennial workforce continue to drive ever more B2B buying decisions."

The Gunderson Dettmer deal team was led by Greg Volkmar and Ken McVay and included Hilary Adams and Valerie Wood.