prepare power point / google slides and updating pitch decks/ impact reports

My business is in need of ongoing support to help us prepare and update marketing materials, pitch decks, and impact reports. We need assistance with both of these types of materials, as we have existing templates and are starting from scratch in some areas. The materials need to be updated on a monthly/quarterly basis. We are looking for a Freelancer that can anticipate our needs, provide cost-effective solutions, and make sure updates are implemented in a timely manner.