Fiserv (NASDAQ:FISV), a provider of e-commerce systems for the financial service industry, edged closer to a 52-week high on Monday after naming former IRS deputy commissioner Mark Ernst as its chief operating officer.

Effective immediately, Ernst will oversee integrated product delivery, service quality, and the company’s achievement of operational effectiveness objectives, reporting directly to chief executive Jeffery Yabuki.

In a statement, Yabuki said Ernst has a “proven track record in delivering strong results” across an array of financial services companies as well as the government.

“His leadership experience will complement our management team as we look to further extend our solution differentiation, and capture a larger share of market opportunities,” he said.

Ernst, 52, most recently served as Deputy Commissioner for Operations Support at the IRS, where he was responsible for technology, operations, shared services, human resources and the chief financial office.

Earlier, he was CEO of privately-owned Bellevue Capital and led the transformation via chief operating officer and subsequently as CEO of tax and financial services at H&R Block (NYSE:HRB).