Ed Dolman was just 39 years old when he became C.E.O. of Christie’s, in 1999, and his first few seasons on the job were tough: The departure of his immediate predecessor, Christopher Davidge, was followed in short order by the revelation of the price-fixing scheme he had cooked up with his counterpart at Sotheby’s. Dolman would become the fixer—running the company for 12 years as the art market recovered from the scandal. During his tenure, he endured the dotcom recession and 9/11, and saw contemporary art rise to dominance.