President Donald Trump will nominate John Sullivan, a partner at Washington, D.C.-based law firm Mayer Brown, as deputy secretary of the State Department, Politico reported Tuesday.

Cristiano Lima writes Sullivan will serve as second-in-command to Secretary of State Rex Tillerson and bring his experience in the federal government to his post once confirmed.

Sullivan joined Mayer Brown in 1993 and currently serves as co-chair of the law firm’s national security practice, where he advises clients on U.S. economic sanctions and export controls, foreign investment and international trade regulations and disputes.

He is chairman of the U.S.-Iraq Business Dialogue, an advisory panel that seeks to advance economic relations between the two countries.

He previously served as deputy secretary at the Commerce Department under the administration of former President George W. Bush and held the roles of general counsel and chair of the U.S.-China Legal Exchange at the agency.

Sullivan also served as deputy general counsel at the Defense Department and during President George H.W. Bush’s re-election campaign in 1992.

Elaine Duke, formerly undersecretary for management at the Department of Homeland Security, has assumed new duties as the seventh deputy secretary of DHS and she will act as the department’s chief operating officer in this capacity.

The nearly 30-year federal service veteran previously managed DHS’ business lines and its $47 billion annual budget, the department said Monday.

“I look forward to working closely with her as the Department continues to move forward in protecting our nation,” said Homeland Security Secretary John Kelly.

Prior to her undersecretary role, Duke previously served as DHS’ chief procurement officer and various positions within the Defense Department.

Duke also held the role of deputy assistant administrator for acquisition at the Transportation Security Administration, where she helped create an acquisition program to help TSA comply with a law that federalized baggage and passenger screening at airports in response to the 9/11 terror attacks.

Chip Fulghum, DHS deputy undersecretary for management, performed the duties of the deputy secretary before Duke was sworn in.

The Department of Homeland Security‘s science and technology directorate has partnered with the Woods Hole Oceanographic Institution and DHS’ Arctic Domain Awareness Center to build an autonomous underwater vehicle to help the U.S. Coast Guard gather under-ice data.

DHS said Friday that WHOI-developed sensor packages and search algorithms that will be integrated onto the Tethys long-range AUV platform in support of efforts to aid the Coast Guard’s response to potential oil spills off the Alaskan coast.

The LRAUV will be transported via a helicopter and deployed to an open water zone close to an environmental hazard to perform missions in areas that may be too dangerous for humans, the department added.

DHS intends for the vehicle to help collect data the Coast Guard can use to develop response plans.

James Bellingham, director of WHOI’s marine robotics center, said the nonprofit research organization aims to help the Coast Guard gain a capacity to understand incidents as soon as possible to have enough time for response.

“Given the additional complexity of conducting response operations in ice infested waters, whether in the Arctic or in the Great Lakes, having the ability to detect and characterize the oil extent under ice can greatly enhance effective response actions,” said Capt. Joseph Loring, chief of the Coast Guard’s Office of Marine Environmental Policy.

“Integral to effective response operations is knowledge of where the oil is and predicting where the oil may go,” Loring added.