Martin Cass
Founder and former CEO, Assembly
Former CEO, Carat USA
More than 30 years leading agencies and senior planning teams in the US and Europe. An experienced adviser to CEOs, CMOs and agency leaders on using media to build business.

MCW gives independent agencies and ambitious brands access to premium inventory, institutional pricing and senior media expertise.
Discover MCW ↓Independent agencies bring focus, agility and a closer understanding of their clients. But premium media buying still rewards scale, experience and relationships.
MCW closes that gap. We bring institutional media advantage to independent agencies and ambitious brands, without requiring institutional scale.
Low CPM does not always mean effective media. We identify the programming, audiences and environments that serve your objectives and that your consumers actually watch.
Decades of marketplace experience and direct media-owner relationships give us access to opportunities beyond conventional buying channels.
We know what inventory is worth, where negotiating leverage exists and how to steward the investment after it is bought.
Private Buying Desk
Senior media capability, without building it yourself.
Inside provides planning, negotiation, buying and stewardship across television, CTV, audio and out-of-home.
Your strategy.
Your client relationship.
Our activation and buying expertise.
Private Marketplace
Origin is a private marketplace built through MCW’s experience and direct media-owner relationships, providing access to premium inventory and institutional pricing outside conventional buying channels.
Not remnant inventory.
Not an open exchange.
Not dependent on holding-company scale.
Origin identifies premium opportunities that may sit outside existing commitments or simply aren’t broadly distributed through conventional channels.
The right media comes first. The advantage follows.
A pharmaceutical brand entering national television needed senior marketplace expertise behind its specialist agency.
mCw reset the investment across planning, negotiation, activation and stewardship.
Disciplined valuation. Competitive negotiation. Active stewardship.
Selected anonymized client engagement. Results are specific to this campaign and do not constitute a forecast.
Detailed credentials available upon request. ↗Martin and Catherine’s experience is the foundation of the model: knowing what to buy, where to find it and how to buy it. Their judgment and relationships are part of the work, every day.
Founder and former CEO, Assembly
Former CEO, Carat USA
More than 30 years leading agencies and senior planning teams in the US and Europe. An experienced adviser to CEOs, CMOs and agency leaders on using media to build business.
Former Chief Investment Officer, Assembly and 360i
Former EVP, Universal McCann
Over 20 years across strategy, investment and business development, with experience spanning local and national media, reservation and biddable buying, and senior media-owner relationships.
Tell us what you need. We’ll begin there.
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