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EVE is a meritocracy. Once someone has shown sufficient sustained commitment to a project by helping out and contributing work to it (and the ASFto LF-Edge), the project may vote to invite that person to become a committer.
How does one show commitment? Simple! Any activity that has been identified in the description of the Committer role counts. For example, get involved and contribute via the user and developer email lists, Wiki and forums (if any); extend or improve the documentation; work on bugs listed in the issue tracker or submit code patches. Answering other users' questions is a great way to get started, as is suggesting patches or improvements tothe LF-Edge EVE website. Note that becoming a committer is not just about submitting some patches; it's also about helping out on the development and user discussion lists, helping with documentation and the issue tracker, and showing long-term interest.
To put it another way, the way to become a committer is to start behaving as though you are one already (since none of these activities – except being able to merge PRs) require any kind of infrastructure karma assigned to you upfront. If you have demonstrated the behaviour long enough, you should expect one of the TSC members to notice and reach out with an offer to become be nominated as a committer on the project. However, if for whatever reason (mostly because TSC members are humans too – and they make mistakes and oversights!) this doesn't happen – there's absolutely no problem with gently reaching out to individual TSC members (or even the TSC mailing list) and politely asking whether the amount of contribution you provided so far would qualify you for a committership.
Next If you accept this nomination, then the next step is for one of the TSC member to initiate a discussion on a TSC private mailing list about nominating you as a committer for the projectyour nomination. The letter should cite all the references in support of the thesis that a given individual has really contributed quite a bit to the project and has demonstrated as much of the behaviour outlined in the Committer role as possible (obviously you don't have to hit all the bullet points – but the more the better).
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