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AAAA Agency Search
Office Employees101-200
Total US101-200
Total Worldwide101-200
Martin Cass, CEO
Martin serves as both the CEO to Assembly and MDC Media Partners, the media agency umbrella group. Martin brings to Assembly over 25 years of experience leading media agencies, most recently heading Carat. He was instrumental in the growth of the agency through integration of digital capabilities, development of data analytics and scaled adoption of communication planning, culminating in the global appointment by General Motors and the honor of Agency of the Year by the U.S. press for the past two years. Martin brings global executive experience to Assembly having worked across Europe, Asia and North America, partnering with many of the world’s leading marketers, including American Express, Beiersdorf, Diageo, Disney, Gillette, Procter & Gamble, The Home Depot, JM Smucker, Red Bull and Relativity Media.
Jeff Brooks, Chief Commercial Officer
Jeff is responsible for the agency’s business development, strategic services and creative agency partnerships. He also oversees several high-profile client engagements. Jeff is uniquely equipped for this role having started his career in Media, and then migrating to Account Management, Strategic Planning and Business Development roles at various high-profile creative and digital agencies. In an age where everything is now media, Jeff could not be more energized about helping brands compete and win through the lens of media.

Jeff is a 20+ year veteran of the industry and has managed staff sizes ranging from 50 to 500 people. He has been responsible for a wide range of duties including setting corporate strategy and vision, P&L management, M&A, talent recruitment and development, new business growth and client retention. Prior to Assembly Jeff was CEO of M&C Saatchi NY for 3 years. Previously he was at Euro RSCG (now Havas) for 6 years as Chief Digital Officer, President and then CEO. Under his leadership Euro RSCG was recognized by AdAge as the #2 Agency in the U.S. Jeff joined Euro RSCG from Atmosphere, BBDO’s U.S. Digital Network, where he spent 5 years as Managing Director and then President. Earlier in his career Jeff held planning roles at agencies including Grey and Ogilvy, and was also involved in an Omnicom-funded tech start-up which Time Magazine named “the web’s best shopping tool.”
Jeff is proud to have been a part of some of the most successful, innovative and awarded communications throughout his career for brands including Dos Equis, Charles Schwab, FedEx, Pantene, Evian, Volvo, GE, AMC, NYSE and The American Legacy Foundation, to name a few.

Jeff speaks at various high-profile industry conferences and has been a returning guest speaker at both Princeton University and The Wharton School of Business. He is on the NY Board of Directors of the 4A’s, is a Trustee of the Little Red Elisabeth Irwin School (LREI), and has been a strategic advisor to several non-profit organizations including Seeds of Peace, The National Center for Entrepreneurship & Innovation and The Robin Hood Foundation.
Michael Nicholas, Chief Innovation Officer
Michael Nicholas is the Entrepreneur in Residence at Assembly, an integrated media agency with unique planning and buying technologies at its core. With two decades of media, creative and technology development experience - including leading agencies and start-ups – Michael has a passionate understanding of brands and technology. An active entrepreneur, Michael was a founder and partner at farm, an innovation consultancy connecting brands and technology start-ups and a co-founder of Weathermob, the mobile, crowd-sourced weather platform. Prior, he was the Chief Strategy Officer at the global creative agency Isobar US where he worked on creative and product development with brands like adidas, Samsung and Sprite. Before that he served as the Director of Innovation at Aegis Media Americas designing award winning communications solutions for brands like Reebok, Coke Zero and Motorola. Today Michael keeps connected to technology start-ups as an active mentor at the Techstars accelerator and as a Fellow at Redstar Ventures.
Steve Farella, Chairman
Steve serves as Chairman at MDC Partners and Assembly Media, a media agency providing scaled media solutions powered by unique planning and buying technologies. Steve began his work in media at Benton & Bowles and over the course of his career he has had extensive experience in nearly every major industry sector. In 2001, Steve founded Targetcast, a media agency specifically designed for strong independent brands, and in the past he has served as the founding CEO of Havas' Media Planning Group, chief media officer at Jordan McGrath Case & Partners, Young & Rubicam, Wells Rich Greene/BDDP and Ammirati & Puris. Currently he’s a member of the Media Policy Committee at the AAAA's, on the Advisory Committee of St. John's University's School of Professional Studies, a speaker at the University of Pennsylvania's Wharton School, a Vice President of the Muscular Dystrophy Association, and a past President of the Advertising Club of New York. In 2010, Steve was awarded as part of the first-ever Media All-Star duo, along with his partner Audrey, for the creation of TargetCast tcm.
Audrey Siegel, Managing Partner
Audrey is Managing Partner. She was co-founder of TargetCast, one of the foundational agencies of Assembly. Audrey is tireless in her pursuit of excellence on behalf of agency clients, and equally committed to creating and maintaining a challenging and nurturing working environment in which creativity and professionalism thrive.
Audrey oversees the day-to-day management of client and staff activity for a portfolio of key agency brands, ensuring that the next generation of leadership is created and cultivated today. Audrey also directs the agency’s research practice, working closely with specialists in syndicated and proprietary resource usage and development to elevate and enrich insights and metrics for all clients.
Directly prior to co-founding TargetCast, Audrey was Managing Director of Havas’ Media Planning Group, directing $400MM in billings for a client base including ING, GlaxoSmithKline, Novartis, and Procter & Gamble. She spent much of her professional life at Saatchi & Saatchi where she managed various Procter & Gamble businesses and created its print AOR management system.

Recognized by her peers and the industry, she was awarded as part of the first-ever Media All-Star duo, along with TargetCast co-founder Steve Farella, for the Agency’s creation. Audrey has also been twice named to AWNY's Working Mother of the Year honorees and awarded the inaugural AWNY Changing the Game Achievement Award. Additionally, she is an innovator in the print media space, having created the industry’s first print AOR Unit for P&G, and is a past Chair of the AAAA’s Consumer Magazine Committee where she was involved with the development of various industry research, including the MARS Study and the Reader Involvement Index. A leader in the advertising industry, Audrey sits on the 4A’s Media Leadership Committee, and is a member of the Ad Club’s Executive Board, chairing the Ad Club’s annual Media:NOW conference; she also works extensively with AWNY, with a focus on development of Executive Leadership programming.
Michael Day, Chief Financial Officer
Michael Day is the Chief Financial Officer for Assembly, responsible for all aspects of management and M&A of the the company, overseeing financial reporting, compliance, corporate finance and investor relations. Michael also provides the leadership role across IT and Real Estate, while driving performance and maximizing profitable growth. Michael brings 20 years of experience to his current role. Prior to joining Assembly, Michael served as the CFO for MDC Media Partners, and as the Global CFO of McCann Healthcare Worldwide. Michael also served as SVP, Global Business and Client Finance, and CFO of N.A. Advertising division at Publicis Healthcare Communications Group, where he led the finance operations across the division along with being responsible for FP&A, reporting, compliance and audit clearance.