Yitzhak Tishler, the company’s sales and marketing manager for Europe, is no longer with Source Vagabond Systems, the Israeli marketer and manufacturer of hydration solutions and sandals. After one and a half years in that position, Tishler is leaving with immediate effect. On an interim basis, his job will be executed by Dalia Cohen, chief executive, for strategic issues and by Vesna Zeidel, export manager, for orders and logistics.