The technical team has primary responsibility for drafting the specification and developing documentation, templates, samples and tools.
There are many ways in which you can participate on the technical team and/or help spread the adoption of the SPDX. They include helping with the specification, helping to maintain the web pages you see here, getting involved in the tools development (as a developer or tester), helping with documentation, being a beta tester for new versions of the specification and tools or even just hanging out and listening to what’s being said.