Complex sentence: Having started at an entry level managerial position, he worked his way up to become the General Manager of Disney's Wilderness Lodge and held a number of positions and helped lead the opening of six resorts in Florida and three resorts at Disneyland Paris.
Split into simpler sentences: Having started at an entry level managerial position, he worked his way up to become the General Manager of Disney's Wilderness Lodge. Rivers held a number of positions and helped lead the opening of six resorts in Florida and three resorts at Disneyland Paris.