Kelly Clark is the Chief Executive Officer of GroupM, a role he assumed in September 2016. Kelly is a truly global executive with strong operational and client management experience across Europe, Asia Pacific and North America.  He has worked closely with some of the world’s leading marketers including NBCUniversal, Target, Unilever, Nike, IBM, Nestle, Kellogg, GSK, Ford Motor Company and L'Oréal.  He has held multiple leadership roles within GroupM and its agencies during his career. Most recently he was CEO of GroupM North America, responsible for all of GroupM’s business activities in the US and Canada, overseeing $30 billion in client billings and 5,500 employees. From 2008 – 2011, Kelly was the worldwide CEO of Maxus, one of five global media agency networks in GroupM.  During his tenure, Maxus was the fastest growing global media agency for four consecutive years according to RECMA.Before leading Maxus, Kelly was CEO of GroupM’s operations in Europe, the Middle East and Africa (EMEA) , responsible for $26 billion in client billings and a team of 6,000. Earlier in his career, he was CEO of Mindshare UK and before that Mindshare Asia Pacific.Kelly has lived and worked in New York, London, Tokyo and Hong Kong during his time with GroupM.  He is a graduate of the University of North Carolina at Chapel Hill.  He lives in New York City with his wife and three children.

Nick co-founded Mindshare in 1997. He has been working in the global media arena for 25 years. Nick's history is as a planner, but he has worked across markets and in all aspects of the media business. Mindshare replaced playing in bands with strange names and has remained his obsession. Mindshare, marriage, two children and a dog is all he has time for.

Stephen Allan was appointed MediaCom's Worldwide Chairman and CEO in August 2008. Stephen's global objectives for MediaCom are clear – to become the world's largest media agency by 2012, and also the best agency to work for in every country. The first, he believes, will be achieved via the latter, and accordingly his first six months as global chairman and CEO saw the launch of numerous new unique global initiatives to support his plans and MediaCom's philosophy People First>>Better Results.Stephen re-joins MediaCom from the role of CEO for GroupM UK, which he moved to in 2005 following six successful years as CEO of MediaCom UK. During his five years of leadership, MediaCom quadrupled its billings, rising from a sixth placed ranking to become the UK's number one media agency, voted Media Agency of Year and one of the UK's Best 100 Companies To Work For.Other career achievements include being the youngest leader of a publicly listed company (the Media Business Group in 1995), and overseeing the undoubtedly most successful merger in the recent UK advertising history (TMBG and MediaCom in 1999).Stephen is married, with one son. He also founded and co-chairs a children's charity, Rays of Sunshine.

Christian Juhl is Global CEO at Essence, a digitally-born media agency that blends data science, objective media, and captivating experiences to build valuable connections between brands and consumers. Clients include Google, Hewlett-Packard, Viber, Intuit, method, Tesco Mobile, Visa, GrubHub, and the Financial Times. The agency is more than 600 people strong, has offices in London, New York, San Francisco, Seattle, Singapore, and Tokyo, manages over $800MM in media spend, and deploys campaigns in 71 markets.In his role as Global CEO, Christian is responsible for driving the agency's growth in creation, innovation, and digital transformation with Essence's clients and people. He originally joined the agency in October of 2013 to lead North American operations, and was made Global CEO in spring of 2014. Christian came to the agency from Razorfish, where he held a number of ascending titles, including SVP Managing Director, VP Client Director, and Director of Business Development, culminating in the position of President of Razorfish's West region, a role he held for over four years. 

Jess has been Global Chief Executive of m/SIX since 2010 – heading up the agency’s media planning and buying operations across 30 offices spanning the UK, Europe, US, South America and Asia. In her time at m/SIX, she has helped establish the business as one of the UK’s fastest-growing media planning and buying agencies, with deep expert knowledge in digital planning, programmatic and data analytics – using data-driven audience insights to inform campaign planning from creative through to media strategy. She has helped m/SIX become a leader in brand safety and transparency, delivering record viewability standards for clients internationally, including TalkTalk, JUST EAT, Virgin Money and Bank of New York Mellon. As a senior partner in WPP-backed agency group The&Partnership, Jess also heads up data and technology projects for all clients across The&Partnership globally, as well as holding the role of Chairman for the group’s content and digital engagement agency AllTogetherNow.Jess has specialist knowledge in retail, telecoms, FMCG, financial services and publishing, having begun her career with the Financial Times, Future Publishing, Gruner and Jahr and Natmags. At Natmags (now Hearst), Jess was responsible for delivering exceptional growth and savings, progressing swiftly to become Chief Operating Officer and then Group MD. As MD, she helped restructure the business, merging Hearst Digital with the core Natmags business and launching all the business’s magazine sites into one digital network.As well as her executive roles in media, Jess also sits on the boards of UK Mail Plc and Quarto Publishing, and is a Trustee for young people’s charity The Mix, which is part of The Royal Foundation’s Heads Together partnership. Jess studied English Literature and Theatre Arts at University, and trained as a ballet dancer – thinking she would pursue ballet professionally until the age of 19. She lives in London with her husband Mark, and is passionate about golf, literature and music as well as media.

In August 2014, Colin Barlow was promoted to the role of Global Chief Operating Officer for GroupM. In this new role he leads financial oversight, acquisitions, corporate partnerships, operational efficiencies of tools, systems and processes and also contributes the oversight of the trading operations.Prior to assuming his current position, Colin served as GroupM’s Chief Financial Officer beginning in 2007, overseeing all financial and information technology management activities for GroupM Global operating agencies which extend across more than 25,000 employees and operations in 70 countries.Colin previously served as CFO of GroupM EMEA. Before moving to GroupM, he worked for Razorfish, Ogilvy, Arthur Andersen, following graduating in Electronic Engineering in the UK.

Stuart Diamond is GroupM’s Global Chief Financial Officer. In this role he is responsible for all financial management activities for GroupM worldwide and its operating companies; which include Maxus, MEC, MediaCom, Mindshare, Xaxis and Essence.Stuart Diamond served as the CFO for GroupM North America from 2008 until 2014. Stuart was responsible for establishing financial strategies for the region as well as overseeing all corporate accounting and financial activities for GroupM and its agencies. In his position he handled budgets, forecasts and takes an active leadership role in GroupM acquisitions.Before joining GroupM, Stuart was CFO for NMHC for two years (2006-2008), a comprehensive pharmacy benefit management company that serves approximately five million members, he oversaw systems and controls of internal accounting to ensure the quality and reliability of NMHC’s financial systems and reporting.Prior to NMHC he was a member of the WPP family as the CFO for Healthworld Corporation taking them (now called Ogilvy Healthworld) public and negotiating their sale to Cordiant Communications in 2000. During his tenure at Healthworld, he completed IPO and the acquisitions of companies in the United States, United Kingdom, France, Italy, Canada, Finland and Spain.Stuart has a BS in Accounting from State University of New York at Buffalo, MBA in Finance from Fordham University and a Masters of Science in Taxation from Pace University, and is also a Certified Public Accountant.  

Elizabeth is GroupM’s Chief Growth Officer, overseeing business development with major global clients and revenue growth for the group. She also leads the team responsible for all marketing and communications relative to GroupM globally.

As a media strategist, Elizabeth has worked across many leading global brands, including Toyota, Exxon Mobil and GE and has been instrumental in GroupM winning and defending several key clients over the past three years.

Prior to GroupM, Elizabeth held senior positions with Omnicom Media Group and Ogilvy. She holds an MBA from the University of Georgia’s Terry School of Business and a bachelor's degree from The College of Charleston. Elizabeth represents GroupM on the Ad Council, a nonprofit producing and distributing public service announcements in the U.S. She also serves on the Board of Directors of Step UP, a nonprofit empowering girl from under-resourced communities with confidence, mentoring and resources.

Mark Patterson is the CEO, GroupM APAC and Chairman, GroupM China. A graduate in commerce from Birmingham University, Mark began his media career in London as a marketing and then sales executive with a leading billboard contractor (now Clear Channel).In late 1988 he joined Ogilvy & Mather London as a media planner and progressed over the next several years to the position of Media Group Director.In October 2000 Mark moved to Tokyo to take on the role of CEO of Mindshare Japan and worked with the team there in establishing Mindshare as the first major media agency in Japan focusing on media planningIn 2002 Mark's role extended to CEO North Asia and in mid 2003 he relocated to Hong Kong managing China, Taiwan, Hong Kong, Japan and Korea.In October 2005 Mark was appointed as CEO GroupM North Asia with responsibility for all WPP's media assets in the sub-region including Maxus, MEC, MediaCom, Mindshare and Kinetic with combined billings of US$3bn (RECMA).In May 2007, Mark was appointed as COO, GroupM Asia Pacific and in June 2008, Mark was appointed as CEO, GroupM Asia Pacific.

Dominic started his career at Price Waterhouse in 1987 where he advised a number of FTSE 100 companies and multinationals specialising in mergers and acquisitions across Europe. 

His media career began in 1997 when he joined CIA as Chief Financial Officer of CIA Europe and was heavily involved in building and consolidating the European network. He became Chief Operating Officer when the CIA regions were aligned to create CIA Worldwide in 2001, moving to CEO in 2002.

Dominic was appointed Chief Executive Officer for GroupM across Europe, the Middle East and Africa (EMEA) in 2008, after a three-year tenure as Managing Director at GroupM EMEA. His responsibilities include managing and growing the European media and digital services across the group - including organic growth as well as mergers and acquisitions. 

In 2016, he gained the additional role of CEO at the WPP Sports Practice, the global entry point to WPP’s sports marketing services and solutions. Overseeing the strategic vision of the organisation, Dominic’s focus is to drive the development of WPP’s global sports marketing offering, managing key client relationships and being WPP’s voice in the world of sports marketing.

José María Sanabria is CEO for GroupM Latin America, a role he was appointed to in 2015.  For five years prior, he was CEO of GroupM Spain where he led the development of the business to new heights of success.  Previously, José María worked in Havas Media for more than ten years where he held various increasingly responsible positions: first as Director of Information Technology, then as General Manager at Media Planning Madrid and later as General Manager of MPG Iberia. Before entering the advertising business, José María developed a career in information technology, a discipline that is now an essential core-competency for modern media investment management.  José María worked both in a hardware manufacturer (NCR) and later in software house, developing business applications for the Public Administration in Spain. José María’s experience includes several management, strategic marketing and executive development programs including programs at The Wharton School of the University of Pennsylvania, Stanford University, and Insead. He has served on the Board of “Autocontrol de la Publicidad” (Advertising Self-Regulation Association in Spain), the Executive Committees of the Media Agencies’ Association in Spain,  the Control Board of Kantar Media (TV audiometry), and also as a member of the Spanish Juries Club of the Effectiveness Awards.  José María is an Aeronautical Engineer.

Tim Castree is North American CEO of GroupM. Tim’s diverse leadership experience spans 20 years in creative, media and integrated agencies. He most recently invented a brand-new agency, Wavemaker, from the merger of MEC and Maxus. He has worked closely with a mix of local, national and global advertisers like L’Oreal, Colgate Palmolive, Mondelez and Vodafone. Tim is leading the radical evolution of GroupM’s business in the world’s largest advertising market with a pointed focus diversifying capabilities and expanding use of data and automation for insights-driven campaign optimization that delivers advertiser growth. 

Nick is Chief Investment Officer, GroupM Global, responsible for world’s largest media investment group with more than $108bn billings (RECMA). He oversees all aspects of GroupM’s media investments, commercial partnerships and trading activities to ensure the benefits of GroupM’s scale are fully realized by advertising clients. Nick is at the forefront in the transformation of investment practices as media becomes more digital and trading becomes more automated and driven by data insights on consumer audiences. He is widely regarded as one of the most successful and skilled media investment leaders in the world.Prior, Nick was GroupM UK’s CEO for ten years, a period of remarkable growth where GroupM UK nearly quadrupled in size, taking incremental share each year and held its position as the number one agency group, double the size of its nearest competitor. Nick maximized the group’s performance by leading collaboration with GroupM agencies and specialist companies around data, technology, trading, content, sports, finance and more.Nick started in the advertising industry in 1982 as a sales executive for HTV. After one year, he joined BMP DDB Needham as a TV buyer and left 10 years later, holding the position of board director. After six years at MediaVest as head of TV buying and deputy MD, Nick then joined Mindshare as head of investment in 2002. In 2004, he became managing director of GroupM Trading which joined together Mindshare and MEC’s media expenditure. In 2006, after WPP bought Grey and housed its media arm, MediaCom, under the GroupM umbrella, Nick’s remit doubled in size. Nick was promoted to COO, and in 2008 became CEO of GroupM UK.Nick is married and has three teenage daughters. He is a keen follower of sport including Chelsea FC, cricket and rugby. He likes to keep fit mainly through swimming and cycling and enjoys the occasional game of golf. He sits on select charitable boards and is a big supporter of NABS.

With over 20 years’ experience in the marketing effectiveness industry, Manjiry has been integral to Gain Theory’s success since its inception and is now Global CEO. In her global role she enshrines the consultancy’s vision and strategy alongside leading global client relationships. Throughout her career - client side (Penhaligons and Debenhams) and agency (Ohal and Gain Theory) - Manjiry’ s guiding principle has been to deliver actionable recommendations that maximize the benefit of marketing investment. To this effect, connecting data, insights and outcomes against KPIs via a high touch consultative approach is of paramount importance to her and has contributed to Gain Theory’s high client retention rate. Manjiry holds a bachelor’s degree from the London School of Economics and an MSc from the University of Warwick. As an accomplished author and speaker, Manjiry has been an advocate in the industry for the importance of balancing magic and logic as well as the challenge and opportunities resulting from the Internet of Things. Manjiry is a member of the Marketing Society and a juror on the Creative Data panel at Cannes Lions, 2016. 

Brian Gleason is Global Chief Executive Officer of Performance Media Group, a business  which serves over 4,000 clients across 50 markets globally. With Performance focused product solutions formulated to meet WPP’s industry leading standards, this group provides omninchannel media across digital, commerce, and TV.  These industry leading companies include Triad Retail Media, Finecast, Emergent, Plista, and Xaxis.

As CEO of Performance Media Group, Brian unites these companies under a shared cause and clear mission, coordinating the complementary strengths of each company to create a larger collective value for clients. 

Prior to this role, Brian was the Global Chief Executive Officer of GroupM’s [m] PLATFORM where he brought together a multi-disciplinary team of over 5,000 individuals obsessed by a desire to develop data-driven breakthroughs and the science of consumer-centric communications. He was also the CEO of Xaxis, a role he was promoted into in 2015 after serving as the CEO, Americas of Xaxis. In his global role, Brian led the overall company strategy, business growth and client development for the world’s largest programmatic audience platform.  During his time at Xaxis he tripled revenue in Xaxis’ largest market, while implementing several ad industry firsts. 

Brian joined Xaxis from the digital publishing industry, where he was the Group Chief Revenue Officer for IDG TechNetwork and IDG Consumer & SMB.  In that role he led sales, marketing, publisher development and programmatic efforts across the more than 550 sites encompassed within the two networks.  He was instrumental in launching IDG’s Tech Media Exchange, the first private advertising exchange in the technology market, with additional responsibility for overseeing ad product development efforts across display, video and mobile advertising channels.  Brian spent the past three years as chairman of the 4A’s data media management task force creating industry standards across addressable media.
 
Named one of Folio Magazine’s 30 under 30 emerging leaders in the publishing industry, and Campaign US 40 over 40 in Digital, Brian’s experience spans advertising, digital media, publishing, data and technology.  He lives in Connecticut with his wife and two children along with his two dogs.

Tim is responsible for GroupM’s human resources strategies, practices, and policies for its over 27,500 employees globally. Tim focuses his attention on the continued enhancement of GroupM’s unrivaled talent community, engaging with the best minds in trading, analytics, data and technology around the world. Tim began his career with the New York Times in 1984 and then moved to Newsweek Magazine in 1987. In 1989, Tim joined Ogilvy & Mather Advertising, part of the WPP family. In 2000, Tim was part of the founding team that formed GroupM Worldwide, and his views have been published by media outlets including the Wall Street Journal, Advertising Age and many more.  He has received numerous awards for his professional and charitable work and has been a guest speaker at the AAF Conference, the NYC Center for Communication and multiple colleges and universities.  He is also a musician and a competitive USTA tennis player. Tim has an undergraduate degree from St. John’s University and a Master’s degree Columbia University.

Brian Wieser is Global President, Business Intelligence for GroupM, WPP’s world-leading media investment Group. He is leading and driving GroupM’s thought leadership practice to ensure that WPP’s clients receive actionable marketplace intelligence on markets, audiences, partners, platforms, and supply and demand dynamics. Wieser is highly regarded in the marketing, media, advertising and technology fields. He’s been called “Madison Avenue’s de facto Chief Economist.” In his prior role as Senior Analyst at Pivotal Research Group, he led the firm’s deep coverage of agencies, video and other digital content platforms, advertising and marketing technology, measurement companies and more. One of the most quoted executives in the industry, he is sought after for the deep understanding he developed as an industry analyst and in earlier roles as an advertising and investment banking executive. Previously, Wieser was EVP, Global Director of Forecasting for Interpublic’s Magna Global, CMO for venture-funded Simulmedia, investment banker at Lehman Brothers, and research analyst at Deutsche Bank. Brian Wieser is a Chartered Financial Analyst (CFA) charter-holder and during his tenure with Pivotal, he received accolades from Institutional Investor for his analyst work.

As GroupM’s global Chief Product & Data Officer, Amit Seth leads product management and development, and stewards strategic data partnerships for the world’s largest media planning and buying group. Working with media experts, data scientists and technologists across the group and WPP, Seth is ensuring data-driven and technology-led innovation is central to the advertiser value proposition of GroupM agencies. Based in Silicon Valley, Seth has worked in artificial intelligence and data for over 20 years and has multiple patents granted in his name. Prior to joining GroupM he held senior leadership positions at Affinity Solutions, Nielsen, Yahoo!, Microsoft, and IBM. As an entrepreneur, Seth founded a successful behavioral data platform and targeting company he sold to Good Technologies, subsequently acquired by Blackberry.  He is a board member and advisor to a number of startups.