There’s a changing of the counsel guard at Walgreens. Effective yesterday, Walgreens’ Executive Vice President, General Counsel and Corporate Secretary Dana Green officially retired after 37 years of leal service. The company hired Thomas Sabatino Jr. to take her place.

Sabatino comes to Walgreens with a wealth of experience in the general counsel role. Most recently, he was general counsel of United Airlines, where he was a leader in the company’s merger negotiations with Continental Airlines, but left the company earlier this year after the merger’s completion. Prior to this, he spent five years as general counsel at Schering-Plough, which he left in 2009 after its merger with Merck & Co.

Earlier in his career, Sabatino also held the general counsel position at Baxter International and American Medical International.

“With each of these companies, Thomas acted as a close advisor to the CEO on central issues each organization faced,” Walgreens President and CEO Greg Wasson said in a release. “His extensive background in health care and extraordinary legal experience make him a perfect fit for the organization as we move forward with our core strategies.”

Green originally joined Walgreens in 1974 as an attorney in employee relations. She eventually became director of that department before being promoted to divisional vice president of employee relations in 1998. After another promotion, she was named corporate vice president of human resources in 2000, and then promoted to senior vice president, general counsel and corporate secretary in 2004. Last year she was named an executive vice president.

“The clear legal counsel and advice, as well as strong ethical foundation and support for team members that Dana provided to the company throughout her career contributed greatly to Walgreens growth and success during each year she was with the company,” Wesson said in the release. “Each member of the management team at Walgreens can thank her for the guidance and support she provided to them at some point in their career.”