John Hammergren, Date of Birth, Place of Birth
TweetJohn Hammergren
American businessman
Date of Birth: 20-Feb-1959
Place of Birth: Saint Paul, Minnesota, United States
Profession: manager
Nationality: United States
Zodiac Sign: Pisces 
About John Hammergren
- John H.
- Hammergren is an American businessman.
- He is best known for his role as Chairman and CEO of McKesson Corporation since 1999.
- On November 1, 2018 John Hammergren announced his plan to retire.
- On April 1, 2019, he officially retired from McKesson.
- He was succeeded by Brian Tyler.
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