In this new role, Ernst will report to president and CEO Jeffery Yabuki.

According to Fiserv, Ernst will provide leadership in several key strategic areas including integrated product delivery, service quality, and the achievement of the company’s operational effectiveness objectives.

Ernst was most recently deputy commissioner for operations support for the Internal Revenue Service, where he was responsible for technology, operations, shared services, human resources, and the chief financial officer.

Prior to that, he was CEO of Bellevue Capital, a private investment firm. He led a transformation of tax and financial services at H&R Block, where he served as COO for three years and as chairman, president and CEO from 2001 through 2007. His background includes senior management positions with the American Express Company and spans more than 25 years in the financial services industry.

Yabuki said Mark’s leadership experience will complement Fiserv’s management team as it looks to further extend its solution differentiation, and capture a larger share of market opportunities.