ExxonMobil in Sarnia, Ontario, is seeking a Senior Administrative Assistant for a 12-month contract on-site. The role supports daily office operations, including typing, filing, answering phones, scheduling, and coordinating meetings, with duties described in the posting. Candidates should have robust communication and organizational skills and be proficient in MS Office, with the ability to multi-task and work with minimal supervision. The position offers hourly pay ranging from $30 to $37.