Last month, American Airlines made changes to senior management, less than two months after president Scott Kirby left to assume a similar role at United Airlines.

New president Robert Isom said in a letter sent to employees that he created two new teams of three executives each: a commercial team and an operations team. Both report to Isom.

“We have to be exceptional at doing the small stuff really really well, and being able to execute day in and day out what we plan,” Isom told the Fort Worth Star-Telegram. “That is going to take a heck of lot of collaboration and coordination … maybe more than we’ve ever done before.”

The commercial team is made up of senior vice president of revenue management Don Casey; senior vice president of network planning, alliances and sales Andrew Nocella; and senior vice president of marketing and loyalty Kurt Stache. On the operations team is senior vice president of regional carriers Kenji Hashimoto; senior vice president of customer experience Kerry Philipovitch; and senior vice president of integrated operations David Seymour.

Another change included making Alison Taylor the senior vice president of global sales.

“Alison has built and led world-class sales teams throughout her career,” Nocella said in a statement. “Her approach to leadership and evolving sales organizations is exactly the kind of fresh thinking we were looking for and fits well with where American is heading. We are thrilled to have Alison step into this critical leadership role.”