Alku announced a majority investment from New Mountain Capital, a New York-based private equity firm. Alku, a provider of IT and life sciences staffing based in Andover, Massachusetts, ranks among the largest US staffing firms. Alku expects to surpass $1 billion in revenue by 2025.

While New Mountain is making a majority investment, it is being joined by others who are reinvesting in Alku. San Francisco-based private equity firm FFL Partners, the existing majority investor, will be reinvesting in the company as will Boston-based private equity firm WestView Capital Partners and Alku founder and CEO Mark Eldridge.

The investment is expected to close in May.

“New Mountain’s experience in human capital management, life sciences and our other key markets will enable us to draw on a deep network of contacts and knowledge that will support our continued industry-leading growth,” Eldridge said. “We are thrilled that our current partners have decided to reinvest with us, and this continuity will allow for continued execution of the strategies that have worked so well.”

Alku was founded in 2008 and has achieved close to $600 million in revenue.

“Mark and the Alku leadership team have built a true market leader that provides highly specialized, expert talent for critical enterprise initiatives in the talent constrained areas of life sciences, enterprise cloud technology, data science and cybersecurity,” said Lars Johansson, managing director at New Mountain Capital.