Onboarding and integration advice is freely available from IFTAS (that's us), a nonprofit trust and safety organisation focused on supporting a safe and civil Fediverse. Traditional public affairs services are available from agencies like Dewey Square Group and other PR and social media consultants.
If you’d like to learn more about how operating an ActivityPub service could benefit your public messaging, contact IFTAS for a free consultation: https://about.iftas.org/contact/ .
Numerous social media management platforms like Buffer, @[email protected] and Fedica support cross-posting to Mastodon. This could be used to mirror content already being posted to agency accounts on X or similar feeds. Chances are the social media team can easily add a Mastodon channel to their existing workflow.