Danfoss Director of Public Affairs Mark Menzer Announces Retirement; John Sheff Appointed to the Position. Danfoss has announced the appointment of John Sheff as its new Director of Public and Industry Affairs for North America. Sheff will succeed Mark Menzer in the role when Menzer retires in July. John Sheff Sheff previously was Business Development Manager for Danfoss in North America, leading cross-business initiatives within buildings, including strengthening engagement with utilities and… Read More