Trump lawyer William Owen Scharf picked for 'crucial' White House assistant role

"I am pleased to announce that William Owen Scharf will serve as Assistant to the President and White House Staff Secretary," Trump's statement read. "Will is a highly skilled attorney who will be a crucial part of my White House team."

The Republican leader added that Scharf, a former federal prosecutor, "has played a key role in defeating the Election Interference and Lawfare waged against me, including by winning the Historic Immunity Decision in the Supreme Court."

"Will is going to make us proud as we Make America Great Again," Trump added.

Scharf, who received an undergraduate degree from Princeton University and a law degree from Harvard University, has clerked for two federal appeals court judges. 

The former prosecutor was also employed by CRC Advisors, a conservative public relations firm, and has also worked for Missouri Gov. Eric Greitens. Scharf also worked as an assistant U.S. Attorney in St. Louis. 

Wright, the CEO of Liberty Energy, "was one of the pioneers who helped launch the American Shale Revolution that fueled American Energy Independence, and transformed the Global Energy Markets and Geopolitics," Trump wrote.

Fox News Digital's Brooke Singman contributed to this report.