Hiya,
understood completely about your project Convert Powerpoint slide decks to Google Slides, and reformat into new style and looked over the description that "I have a set of 11 Powerpoint slide decks that each need to be (1) converted to Google Slides; and (......" so on
I am an expert graphics designer with skills including Google Docs, Format & Layout, Copy Typing, Presentations and Powerpoint.
i got it that you are in need of graphics design , i offer my professional services for the said job, Based on my experience and skills i can assure your quality design results right according to your standards.
Link to my profile for you to have an idea of my skills:
https://www.freelancer.com/u/LetsDezign.html
Are you available in chat so we may discuss in detail?