From Vendor to Trusted Advisor: How Agencies Earn a Seat at the Strategy Table

For years, agencies have fought the same battle: clients say they want strategic partners, yet too often agencies are treated as vendors — briefed late, kept to execution, and judged on deliverables alone. The agencies that earn a seat at the strategy table rarely get there through better campaigns. They get there through trust.

Drawing on more than 20 years in marketing — leading in-house teams, managing agency relationships across markets, and now advising as a Fractional CMO — Dimi Ilieva has seen the partnership from both sides: she has hired, challenged, and fired agencies, and built the rare ones that became indispensable. In this talk she shares practical lessons from both perspectives: why clients treat agencies as vendors even when they ask for partners; the trust-building behaviours that turn a supplier into an advisor; how to navigate hard conversations about performance, budgets and expectations; what agency leaders misunderstand about executive decision-making; and how to speak the language of business outcomes rather than marketing activity.

The takeaway: the most valuable agencies aren’t the ones with the best campaigns — they’re the ones clients invite into the room before the brief is even written.