The People
Behind the Results

The people who built your strategy are the ones running it. Our leadership team brings decades of holding company and performance media experience to every client engagement – accountable to your growth, not billable hours.

Kate O'Brien

Kate O'Brien

Founder and Chief Executive Officer

Kate spent her career building and running performance media inside the largest holding companies in the world. She founded Powers because the industry's economics were broken: agencies profited from spend, not from results. She built a model where client savings are guaranteed, performance is measured against real business outcomes, and every dollar is accounted for.

Jason Jahn

Jason Jahn

Chief Marketing Officer

Jason leads brand, marketing, and new business at Powers, helping the agency tell its story and grow. He spent a decade at Omnicom, where he was one of the first 20 employees at Hearts & Science, built its marketing function from scratch, and helped it grow to 1,600 people across 37 offices. His work connects how an agency presents itself with how it wins business.

Brian Sypniewski

Brian Sypniewski

Managing Director, Performance Strategy

Brian leads client strategy at Powers, ensuring every media plan is built to deliver results that show up in the P&L – not just in a media report. His expertise spans data analytics, omnichannel performance, investment strategies, and attribution measurement.

Millie Diaz

Millie Diaz

Managing Director

Millie Diaz leads integrated communications, media strategy, and planning at Powers, ensuring every engagement is built on a foundation of research, analytics, and a clear path to growth. She brings a cross-category fluency shaped by two decades across pharma, consumer healthcare, CPG, and business-to-business.

Guilherme Falcão

Guilherme Falcão

Creative Director

Guilherme leads creative direction at Powers, helping clients turn strategy into brand identities, campaigns, and content. He previously led creative for content and social platforms at Nubank and was Senior Art Director at Nexo Jornal in São Paulo. His experience spans visual identity, digital experiences, print, and film, bringing creative thinking and execution into the same team that plans and runs the media.

Andrea De Marco

Andrea De Marco

Associate Director, Strategy

Andrea brings a rare perspective to media strategy: she's worked both sides of the table. After years on the agency side planning and buying media, she spent time on the client side, which means she knows what it's like to be the person receiving the recommendation, not just the one making it.

How We Staff

Every account is led by the senior operators who built the strategy, supported by an extended network of channel, data, and analytics specialists deployed as the work requires, with no junior handoffs and no layers between your strategy and its execution.

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Industry Affiliations

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