These include advising energy consumers that their neighbour is saving money.
They include advising professional gamblers and betting on games, including some games in which he was a referee.
Other jobs include advising guests if they require any treatment, for example dentistry, hair cuts, opticians, financial or bereavement services.
Goldman's transactions include advising Dell Inc. in its proposed takeover by Michael S. Dell and Virgin Media in its sale to Liberty Global.
Those include advising Autonomy in its sale to Hewlett-Packard and Yahoo as it explores strategic options that include a potential sale.
Mr. Erda, 31, is a senior associate at the Seabury Group, an investment banking firm in New York, where his duties include advising airlines in bankruptcy proceedings.
The responsibilities will include advising municipal governments about obscenity law, helping tailor ordinances to suit local tastes as the United States Supreme Court has allowed, arbitrating problems when possible and prosecuting violations when necessary.
His recent cases include advising a law firm on the possibility of proving authorship of a handwritten, unwitnessed will of a 90-year-old Holocaust survivor who spoke Yiddish.
It has since increased its offerings to include advising on 401(k) and retirement plans for small businesses and creating a trust bank so clients could name it as a trustee of their assets.
The White House declined to have Ms. Koop be interviewed, issuing this statement by e-mail: "Ms. Koop's responsibilities include advising the first lady on her wardrobe and acting on her behalf in arranging for purchases".
That group's assignments include advising the Greek government in its negotiations with creditors, the United States government in its holdings of General Motors and the union representing United States postal workers.
