The State Department decided in January not to renewa personnel protection contract with Blackwater, as the company was then known, when it expired in May.
Faced with persistent speculation about his future as boss of Siemens, Mr Kleinfeld told the 20-strong board before their gathering that he would leave the company if they did not make a firm commitment to renew his contract.
The 27-year-old, who has played 19 Tests for Zimbabwe and has a batting average of 42.84, will not renew his contract with his country after the one-day series against England and the West Indies next month.