He subsequently worked for the Palestine Potash Company , later known as the Dead Sea Works , in Jerusalem .
Kessler started his career by working for Antonin Besse , an oil and shipping businessman with ties to the Royal Dutch Shell in Aden , Yemen .
Kessler subsequently worked for the Palestine Potash Company , later known as the Dead Sea Works , in Jerusalem .
Kessler started his career by working for Antonin Besse , an oil and shipping businessman with ties to the Royal Dutch Shell in Aden , Yemen .