How a marketing agency is usually structured
Agencies split into client services (account teams who own the relationship), creative (copy and design), strategy, and media or performance. Account directors pull people from each team per client, which is why agencies often use a light matrix.
Accounts cut across departments
Creatives report to the creative director but work on accounts led by account directors. Add dotted lines to show those client pods.
Keep a studio or ops lead
Traffic, resourcing and billing need an owner; a studio manager or operations lead fills that gap.