The former president of a Maryland transportation company was found guilty of participating in a scheme to bribe a unit of a Russian nuclear energy company, the Justice Department said Friday.

Mark Lambert, 56 years old, was convicted by a Maryland jury of various counts of violating the Foreign Corrupt Practices Act, as well as wire fraud and conspiracy charges, according to the department.

The former Transportation Logistics Inc. executive was acquitted on three other counts of violating the FCPA and of a money-laundering charge, a Justice Department spokesman said.

A lawyer for Mr. Lambert said he planned to evaluate whether he could file a motion for a new trial, based on the jury’s mixed verdict. The lawyer said they also would request a review by an appeals court if necessary.

“We were very disappointed that after seven days of deliberations and a jury inquiry regarding the meaning of ‘reasonable doubt,’ as well as two deadlock notes, the jury—on the Friday afternoon before Thanksgiving week—decided to render a partial and inconsistent verdict,” said William Sullivan Jr., a partner at Pillsbury Winthrop Shaw Pittman LLP who represented Mr. Lambert.

Mr. Lambert was accused of participating in a scheme to bribe Vadim Mikerin, a Russian official at a subsidiary of Russia’s State Atomic Energy Corp.—the country’s sole supplier and exporter of uranium—to secure business contracts.

Mr. Mikerin in 2015 pleaded guilty to conspiracy to commit money laundering charges and was sentenced to four years in federal prison.

Two other Transportation Logistics executives also pleaded guilty to foreign bribery conspiracy charges.

The trial of Mr. Lambert, which took place at the U.S. District Court for the District of Maryland in Greenbelt, Md., began Oct. 29. Jurors deliberated for a week before returning their verdict.

The former executive is scheduled to be sentenced on March 9.

Write to Dylan Tokar at dylan.tokar@wsj.com