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(CNN) —  

George Sorial, who since 2017 has served as the Trump Organization’s top compliance official, is leaving the company after a dozen years.

Sorial said in an interview with CNN that his last day is expected to be June 7. He will be replaced by another attorney at the firm, Jill Martin, Sorial said.

He said he’s leaving to focus on a forthcoming book he co-wrote called The Real Deal: My Decade Fighting Battles and Winning Wars with Trump.

Sorial said the book, which is being published by an imprint of HarperCollins that focuses on conservative ideas, includes details about his work on some of the company’s most contentious projects, including the transformation of 1,400 acres of Scottish coastline in Aberdeenshire into a golf course and resort.

The departure comes as the Trump Organization is under increasing scrutiny by the Democratic-led House, as well as federal and state law enforcement in New York, over its accounting and business practices.

One chapter of the book will focus on Michael Cohen, according to Sorial. Cohen couldn’t immediately be reached for comment.

Sorial joined the company as a lawyer in 2007, eventually helping to oversee planning, redesign and construction of many of the company’s prized golf properties alongside Trump and his children.

Before he worked at the Trump Organization, Sorial lived in a Trump condominium across the street from the United Nations on Manhattan’s East Side, serving for a decade as the president of the building’s board.

After the election, the company named him chief compliance counsel. The role was created as part of a larger effort to monitor and address potential conflicts of interest arising from his former boss’s relocation to the White House.

Sorial became the primary liaison between the Trump Organization and congressional Democrats who have launched multiple investigations of the President’s business. In February, House Intelligence Chairman Adam Schiff announced a broad investigation into whether President Donald Trump’s financial interests are driving his actions.

The House Judiciary Committee launched a sweeping probe into possible corruption, abuse of power and obstruction of justice. As part of that examination, the committee requested documents from Trump Organization executives, including Eric Trump and the company’s general counsel Alan Garten.

New development deals have ground to a halt at the Trump Organization since the election. Growth at the firm’s licensing arm has also slowed.

Earlier this year, the company shelved plans for two new licensing concepts, Scion and American Idea. Eric Trump blamed politics for the stall in a statement to CNN at the time.

“We live in a climate where everything will be used against us, whether by the fake news or by Democrats who are only interested in Presidential harassment and wasting everyone’s time, barraging us with nonsense letters. We already have the greatest properties in the world and if we have to slow down our growth for the time being, we are happy to do it,” he said.

CNN’s Jeremy Herb and MJ Lee contributed to this report.