The president of Bristow Group's Air Logistics unit, Mike Suldo, is retiring, as is Bristow's vice president of global standards, Bill Hopkins. Suldo, who also held the post of senior vice president, Western Hemisphere, will be succeeded in that post by Mark Duncan, currently senior vice president of global business development. Suldo plans to retire later this year, Hopkins on March 31. Patrick Corr, currently senior vice president for global training, will take the new post of senior vice president of global safety, training and standards. With Suldo's retirement, Bristow's Western Hemisphere division headquarters will be relocated from New Iberia, La. to to Houston.