July 30 (Reuters) - The U.S. Treasury on Thursday said the

director of its anti-money laundering Financial Crimes

Enforcement Network, Andrea Gacki, was stepping down to join

Citigroup ( C ) as the bank's global head of sanctions.

Gacki is leaving government service after 25 years at the

Treasury and the Department of Justice and will remain at FinCEN

for several weeks to support a smooth leadership transition, the

Treasury said. She has headed FinCEN since 2023.

The department appointed career Treasury official and former FBI

forensic accountant Jenna Casanova as acting FinCEN director.

Casanova most recently served as senior adviser to the Treasury

undersecretary for terrorism and financial intelligence, where

she worked on efforts to combat illicit finance and coordinated

policies across FinCEN, the Office of Foreign Assets Control and

other Treasury offices.

The Treasury said that Casanova previously worked on FinCEN

enforcement actions, helping lead the case that resulted in a

record $1.3 billion Treasury fine against TD Bank. That

was part of $3 billion in total penalties assessed for

violations of the Bank Secrecy Act, the main federal anti-money

laundering law.

Citi said Gacki will start on October 1 and join its

Independent Compliance Risk Management leadership team, helping

clients in "navigating the increasingly complex sanctions

landscape."

Brent McIntosh, Citi's chief legal officer and corporate

secretary, who served alongside Gacki as Treasury undersecretary

for international affairs during the first Trump administration,

said that Gacki was well-respected in both the banking industry

and government.

"Few leaders can match Andrea Gacki's depth of experience in

sanctions and financial crime. Her history of thoughtful and

proactive leadership makes all of us at Citi excited to have her

joining as our Global Head of Sanctions," McIntosh said in a

LinkedIn post.