Kashdan was awarded the Grandmaster title in 1954, and the International Arbiter title in 1960. Kashdan captained the American Olympiad team for Leipzig 1960 to a silver medal finish. Brady praised Kashdan's contribution: "Possibly the most valuable member was a non-player, Isaac Kashdan. As team captain, he brought to our players an incomparable knowledge not only of the complications of international team chess, but also of the zest and confidence of the Thirties that had seen him front and center in an unbroken succession of American victories."