There's someone who has been making consistently high-quality contributions to Homebrew and shown themselves able to make slightly more advanced contributions than just e.g. formula updates? Let's invite them to be a maintainer!
- Invite them to the [**@Homebrew/maintainers** team](https://github.com/orgs/Homebrew/teams/maintainers) (or any relevant [subteams](https://github.com/orgs/Homebrew/teams/maintainers/teams)) to give them write access to relevant repositories (but don't make them owners). They will need to enable [GitHub's Two Factor Authentication](https://help.github.com/articles/about-two-factor-authentication/).
- Invite them as a full member to the [`machomebrew` private Slack](https://machomebrew.slack.com/admin/invites) (and ensure they've read the [communication guidelines](Maintainer-Guidelines.md#communication)) and ask them to use their real name there (rather than a pseudonym they may use on e.g. GitHub).
In the interests of loosely verifying maintainer identity and building camaraderie, if you find yourself in the same town (e.g living, visiting or at a conference) as another Homebrew maintainer you should make the effort to meet up. If you do so, you can [expense your meal](https://docs.opencollective.com/help/expenses-and-getting-paid/submitting-expenses) (within [Homebrew's reimbursable expense policies](https://opencollective.com/homebrew/expenses)). This is a more relaxed version of similar policies used by other projects, e.g. the Debian system to meet in person to sign keys with legal ID verification.
- Invite them to the [**@Homebrew/plc** team](https://github.com/orgs/Homebrew/teams/plc/members)
- Make them [billing managers](https://github.com/organizations/Homebrew/settings/billing) and [moderators](https://github.com/organizations/Homebrew/settings/moderators) on the Homebrew GitHub organisation
- Invite them to the [**@Homebrew/tsc** team](https://github.com/orgs/Homebrew/teams/tsc/members)
- Make them [billing managers](https://github.com/organizations/Homebrew/settings/billing) and [moderators](https://github.com/organizations/Homebrew/settings/moderators) on the Homebrew GitHub organisation
People who are either not eligible or willing to be Homebrew maintainers but have shown continued involvement in the Homebrew community may be admitted by a majority vote of the [Project Leadership Committee](Homebrew-Governance.md#4-project-leadership-committee).
- Invite them as a single-channel guest to the #members channel on the [`machomebrew` private Slack](https://machomebrew.slack.com/admin/invites) (and ensure they've read the [communication guidelines](Maintainer-Guidelines.md#communication)) and ask them to use their real name there (rather than a pseudonym they may use on e.g. GitHub).