I work at Microsoft and lead one of the OpenSSF working groups (https://github.com/ossf/wg-identifying-security-threats). We're always looking for folks to join the conversation and contribute to any working groups. There is a public calendar for those meetings, and there is a recording of our last town hall at https://openssf.org under the Community menu at the top.

I'm also looking to hire a software/security engineer to join our team at Microsoft, to improve security tooling and analysis around open source. This work will align/contribute to OpenSSF projects. If you like having one foot in software development and the other in security, please take a look: https://careers.microsoft.com/us/en/job/1009857