Create a folder with the name of the author on content/author
Copy a picture for the profile in themes/ropensci/static/img/community unless they have a GitHub profile with a picture, which will be used by default.
Create an _index.md with the following content:
---
name: Name Of The Author
github: github user
link: web page link
img: img/community/name-of-the-author-picture.png
---
To add on: https://blogguide.ropensci.org/authortemplate.html
Author