Sentence 1: Heather Weaver has been head of the group since 2003 and since 2017 Sharon Northe has been President of the Group .
Sentence 2: Heather Weaver has been the conductor of the group since 2003 and Sharon Northe has been President since 2017 .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?