Ace Group of Companies US-based retail operating division Ace USA has appointed John Nilson to the position of senior vice president, western region for Ace Risk Management.

Based in Los Angeles, Mr. Nilson will oversee ARM branch operations for the western region, working with brokers in managing new business development and underwriting activities and serving middle and large account commercial customers.

"We're pleased to continue rolling out our field operations strategy of establishing a regional presence across the United States through representation of 'One Ace' to customers, brokers and prospects through various distribution channels," said Joseph S. Clabby, President, Ace USA West.