Who this is for
You have Marketing Cloud, Braze, or another platform. You need someone to actually run it: build the journeys, code the templates, manage the data extensions, run the SQL, QA the sends, watch deliverability, and own the operational reality of marketing every week.
You are choosing between hiring a full time marketing ops lead, asking your creative agency to do platform work they are not actually good at, or absorbing it inside a team that already has day jobs. None of those scale well.