 Despite Medtronic's troubles at the time, revenue increased by $1 billion during his tenure.He retired as CEO of the medical device maker six years later, naming Bill George as his successor and turning his attention to philanthropy.In 1991, Wallin and his wife formed the Wallin foundation, later Wallin Education Partners, which gives financial aid and advice to promising Minnesota public school students from low-income families to attend college.As of 2017, Wallin Education Partners had aided 4,400-plus college students through nearly $50 million in scholarships and critical guidance services.