A prominent political operatives, who has lobbied for the Yankees and is active in Democratic politics, is facing a $15,000 fine for conducting business related to his private law practice on city time. Stanley Schlein, a former chairman of the city’s Civil Service Commission, asked his office manager to type and mail letters to his legal clients, prepare invoices, inventory documents related to a lawsuit, and meet with people associated with the case while he worked for the commission, according to a disposition from the city’s Conflicts of Interest Board released yesterday.

Mr. Schlein told the board he made more than 2,000 calls unrelated to city work from city telephones, and he said he also asked an associate to deliver packages, send faxes, greet visitors, and collect material from his car related to his outside legal work.

The fine is the third-highest penalty the board has issued since its creation by the 1988 City Charter revision.

A spokesman for Mr. Schlein, George Arzt, said his client decided to “settle this matter on a expeditious basis and has agreed to the stipulated payment called for in the settlement.”

A political heavyweight, Mr. Schlein provides counsel to members of the Bronx Democratic Party, advised the Reverend Al Sharpton when he ran for president in 2004, and worked with mayoral candidate Fernando Ferrer when he challenged Mayor Bloomberg in 2005.

Mr. Bloomberg designated him chairman of the New York City Civil Service Commission in 2002. Mr. Schlein first was appointed to the commission in 1990 and left in 2006, after Mr. Bloomberg refused to reappoint him. A spokesman for Mr. Bloomberg, Stuart Loeser, declined to comment.

In 2006, political circles were atwitter after the state’s Office of Court Administration removed Mr. Schlein from a list of candidates for lucrative judicial appointments. It was considered a sign of possible legal problems for Mr. Schlein and the Bronx Democratic organization.

Michael Nieves, an aide to Bronx Democratic chairman, Assemblyman Jose Rivera, said Mr. Rivera had no comment on the report, saying it’s not related to any work he has done for the county party. “The chairman’s position is clear: He doesn’t discuss any of Stanley’s private law practices,” Mr. Nieves said.

In 2007, Mr. Schlein earned more than $150,000 for lobbying the city for various clients, including the Exxon Mobil Corp., Easton-Bell Sports, and the Women’s Housing and Economic Development Corp., located in the Bronx, which paid him $36,000 last year, according to the lobbyist database maintained by the City Clerk.