Gretchen Watkins (pictured above), president of Shell USA, Houston, is leaving on July 31, after seven years with the energy ...

Shell’s EVP Gulf of America Colette Hirstius will take the helm of energy giant’s U.S. operations staring in August ...

Colette Hirstius is set to succeed Gretchen Watkins, who will step down on July 31 after holding the position for the past ...