Gary Parr had deals going in three parts of the world when he dropped the mic on a 30-year career as a banker. Parr, 59, has been a player in just about every financial story worth bold headlines in recent years. Now he’s left Lazard Ltd. for Apollo Global Management LLC, to work with co-founders Leon Black, Mark Rowan and Josh Harris. Parr starts today with a broad mandate as a senior managing director.