Two of Dan Gilbert's top development executives are no longer going to be involved in some of his biggest construction projects in Detroit.

Steve Rosenthal is giving up his duties as principal of Gilbert's Bedrock LLC real estate development and management firm. He and Jeff Cohen, who had no formal title with Bedrock but worked on projects for the Detroit-based company, are turning their attention to the company they founded together, Rock Cos., which has no formal affiliation with Gilbert.

Bedrock's ambitious construction plans for downtown will not be affected by Rosenthal's and Cohen's departure, Jim Ketai, the CEO of Bedrock who founded the company with Gilbert, said in a statement.

"All of our existing, proposed and (as) well as some exciting future development projects yet to be announced will continue to move forward as planned," Ketai said in the statement."

"We have a deep bench of leadership and talented partners in connection with all of our development projects and, most importantly, we are more passionate than ever about 'going vertical' in Detroit, creating jobs and making a positive impact on the city any way we can."

People in the development community view Cohen as being instrumental to Gilbert's planned high-rise building on the vacant 2-acre former J.L. Hudson's department store site on Woodward Avenue at Grand River Avenue.

Rosenthal has been a prominent public face of Gilbert projects, including City Modern in Brush Park and a planned development on two blocks downtown east of the former Compuware Corp. headquarters that would bring a residential building at least 16 stories tall and an office building at least 20 stories tall to the central business district on the Monroe Block.

"Rock Companies and, specifically Jeff Cohen and Steve Rosenthal, have been longtime partners and friends to the Family of Companies," Ketai said. "As the Family of Companies' real estate portfolio in Detroit has gone from zero to 95-plus buildings and developments, Rock Companies has supplemented Bedrock and Jack Entertainment to scale quickly during this time of tremendous growth."

According to the Bedrock website, Rosenthal is also a co-founder and president of Rock Cos. and principal of Jack Entertainment, Gilbert's casino and gaming company.

The Rock Cos.' website says Cohen is also principal of Jack Entertainment plus a vice chairman and minority owner of the Cleveland Cavaliers, owned by Gilbert.

Since 2011, Gilbert has purchased more than 95 properties in and around downtown Detroit, primarily buildings and parking decks, totaling more than 15 million square feet.

Bedrock is the region's fifth-largest nonresidential property manager, according to Crain's 2017 Book of Lists.