Omnicom Group Executive and Leadership Team

June, 2026

Leadership Overview

Omnicom Group has 10 executives leading key functions including strategy, technology, finance, operations, and branding.

Driven by a commitment to innovation, Omnicom Group is dedicated to providing comprehensive marketing and communications solutions, leveraging data, technology, and creative expertise to foster stronger brand-audience connections and address complex business challenges globally.

Leadership Roles at Omnicom Group

  • Chairman & Chief Executive Officer - John Wren
  • Chief Executive Officer (Omnicom Digital) - Jonathan Nelson
  • Chief Executive Officer (Omnicom Branding) - Mark O'Brien
  • Chief Executive Officer, Colenso BBDO Zealand - Angela Watson
  • Chief Financial Officer, Omnicom Advertising - Denis Streiff
  • Co President & Co Chief Operating Officer - Daryl Simm
  • Chief Operating Officer, Omnicom Advertising - Deepthi Prakash
  • Chief Operating Officer, Omnicom Production - Eduardo Legorburu
  • Chief Operating Officer, Omnicom Advertising - Deepthi Prakash
  • Chief Operating Officer, Omnicom Production - Eduardo Legorburu
  • Chief Operating Officer, Omnicom Production - Eduardo Legorburu
  • Chief Technology Officer - Udi Aharon
  • John Wren - Chairman & Chief Executive Officer

    John Wren, the Chairman & Chief Executive Officer at Omnicom Group, directs the overarching strategy and global operations of the company. Wren guides Omnicom's mission to deliver innovative marketing and communications services, integrating data insights, advanced technology, and creative expertise to solve complex client challenges. The Chairman & Chief Executive Officer ensures the company's continued market leadership by fostering a culture of collaboration and driving strategic growth across all business units. This leadership role involves setting the vision for Omnicom's diverse portfolio, which spans advertising, media planning, public relations, and digital marketing. Wren's focus remains on building stronger connections between brands and their audiences through cutting-edge solutions. The Chairman & Chief Executive Officer oversees the executive team, ensuring alignment with corporate objectives and maximizing shareholder value. John Wren's strategic direction is pivotal in navigating the evolving landscape of global marketing and communications.
    John Wren

    Jonathan Nelson - Chief Executive Officer (Omnicom Digital)

    Jonathan Nelson, the Chief Executive Officer (Omnicom Digital) at Omnicom Group, spearheads the company's digital transformation and innovation initiatives. Nelson directs the strategy and execution of digital marketing, commerce solutions, and data-driven services designed to enhance brand presence and audience engagement. The Chief Executive Officer (Omnicom Digital) oversees a portfolio of digital agencies and platforms, ensuring seamless integration of creative expertise and advanced technology. This leadership position is crucial for addressing the evolving digital landscape and client demands for sophisticated online strategies. Jonathan Nelson's focus is on leveraging digital insights to build stronger connections between brands and consumers across all online channels. The Chief Executive Officer (Omnicom Digital) drives the development of new digital products and services, positioning Omnicom as a leader in the digital marketing space. Nelson's strategic vision ensures Omnicom's digital capabilities consistently deliver measurable business outcomes for clients.
    Jonathan Nelson

    Mark O'Brien - Chief Executive Officer (Omnicom Branding)

    Mark O'Brien, the Chief Executive Officer (Omnicom Branding) at Omnicom Group, directs the strategic vision and operational execution for the company's branding services. O'Brien oversees the development and implementation of comprehensive branding strategies, encompassing market research, brand identity development, and brand positioning. The Chief Executive Officer (Omnicom Branding) leads a team dedicated to creating impactful brand experiences that resonate with target audiences. This leadership role is crucial for helping clients navigate complex branding challenges and build lasting market presence. Mark O'Brien's expertise lies in translating consumer insights and market dynamics into effective branding solutions. The Chief Executive Officer (Omnicom Branding) ensures that Omnicom's branding initiatives are aligned with clients' overall business objectives and drive measurable growth. O'Brien's strategic guidance strengthens Omnicom's position as a leader in brand development and management.

    Angela Watson - Chief Executive Officer, Colenso BBDO Zealand

    Angela Watson, the Chief Executive Officer, Colenso BBDO Zealand at Omnicom Group, leads the strategic direction and operational management of the New Zealand-based advertising agency. Watson drives the agency's creative output and client service delivery, ensuring innovative marketing and communications solutions are provided to local and international clients. The Chief Executive Officer, Colenso BBDO Zealand oversees the integration of data insights, technology, and creative expertise to address complex business challenges within the New Zealand market. This role is pivotal in fostering a high-performance culture and maintaining the agency's reputation for award-winning work. Angela Watson's focus is on strengthening brand-audience connections through compelling campaigns and strategic brand building. The Chief Executive Officer, Colenso BBDO Zealand collaborates with Omnicom's global network to leverage best practices and drive growth. Watson's leadership ensures Colenso BBDO remains a leading force in the advertising industry in New Zealand.

    Denis Streiff - Chief Financial Officer, Omnicom Advertising

    Denis Streiff, the Chief Financial Officer, Omnicom Advertising at Omnicom Group, manages the financial operations and strategic fiscal planning for the advertising division. Streiff oversees budgeting, forecasting, and financial reporting, ensuring robust fiscal health and profitability for Omnicom's advertising services. The Chief Financial Officer, Omnicom Advertising plays a key role in resource allocation, investment decisions, and driving financial efficiency across advertising agencies. This position is vital for supporting the creative and media planning functions with sound financial management. Denis Streiff's responsibilities include analyzing market trends and their financial implications to guide strategic growth. The Chief Financial Officer, Omnicom Advertising ensures compliance with financial regulations and optimizes financial performance to support client-focused initiatives. Streiff's expertise is critical in maintaining the financial integrity and competitive positioning of Omnicom's advertising sector.
    Denis Streiff

    Daryl Simm - Co President & Co Chief Operating Officer

    Daryl Simm, the Co President & Co Chief Operating Officer at Omnicom Group, shares responsibility for the company's global operational execution and strategic initiatives. Simm collaborates on driving efficiency and effectiveness across Omnicom's diverse marketing and communications services, ensuring seamless delivery of creative, media, and strategic solutions. The Co President & Co Chief Operating Officer oversees the integration of various business units to maximize synergy and client value. This role is instrumental in managing the day-to-day operations and implementing strategies that address complex business challenges. Daryl Simm's focus is on optimizing operational workflows and fostering innovation within the company's extensive network. The Co President & Co Chief Operating Officer works closely with other executive leaders to achieve corporate objectives and enhance market competitiveness. Simm's leadership ensures Omnicom's operational excellence supports its mission of building stronger brand-audience connections worldwide.

    Deepthi Prakash - Chief Operating Officer, Omnicom Advertising

    Deepthi Prakash, the Chief Operating Officer, Omnicom Advertising at Omnicom Group, directs the operational strategies and execution within the advertising division. Prakash ensures the efficient delivery of advertising, branding, and media planning services, aligning operational capabilities with client objectives. The Chief Operating Officer, Omnicom Advertising oversees the integration of creative processes and technological advancements to enhance campaign effectiveness. This role is critical for optimizing resource allocation and streamlining workflows to meet the dynamic demands of the advertising industry. Deepthi Prakash's responsibilities include driving operational excellence and fostering collaboration among creative teams and account management. The Chief Operating Officer, Omnicom Advertising focuses on implementing best practices that support Omnicom's commitment to building stronger connections between brands and their target audiences. Prakash's leadership ensures the advertising division operates at peak performance, delivering impactful results for clients.
    Deepthi Prakash

    Eduardo Legorburu - Chief Operating Officer, Omnicom Production

    Eduardo Legorburu, the Chief Operating Officer, Omnicom Production at Omnicom Group, leads the operational framework for the company's production services. Legorburu oversees the execution of production workflows, ensuring high-quality output in areas such as content creation, digital asset management, and experiential marketing. The Chief Operating Officer, Omnicom Production is responsible for optimizing production processes, integrating advanced technologies, and managing resources to meet client timelines and budgets. This role is essential for delivering scalable and efficient production solutions that support Omnicom's broader marketing and communications strategies. Eduardo Legorburu's focus is on enhancing production capabilities to drive innovation and client satisfaction. The Chief Operating Officer, Omnicom Production collaborates with creative and strategic teams to ensure seamless project delivery. Legorburu's operational leadership strengthens Omnicom's capacity to produce compelling content and experiences for brands globally.

    Deepthi Prakash - Chief Operating Officer, Omnicom Advertising

    Deepthi Prakash, the Chief Operating Officer, Omnicom Advertising at Omnicom Group, directs the operational strategies and execution within the advertising division. Prakash ensures the efficient delivery of advertising, branding, and media planning services, aligning operational capabilities with client objectives. The Chief Operating Officer, Omnicom Advertising oversees the integration of creative processes and technological advancements to enhance campaign effectiveness. This role is critical for optimizing resource allocation and streamlining workflows to meet the dynamic demands of the advertising industry. Deepthi Prakash's responsibilities include driving operational excellence and fostering collaboration among creative teams and account management. The Chief Operating Officer, Omnicom Advertising focuses on implementing best practices that support Omnicom's commitment to building stronger connections between brands and their target audiences. Prakash's leadership ensures the advertising division operates at peak performance, delivering impactful results for clients.
    Deepthi Prakash

    Eduardo Legorburu - Chief Operating Officer, Omnicom Production

    Eduardo Legorburu, the Chief Operating Officer, Omnicom Production at Omnicom Group, leads the operational framework for the company's production services. Legorburu oversees the execution of production workflows, ensuring high-quality output in areas such as content creation, digital asset management, and experiential marketing. The Chief Operating Officer, Omnicom Production is responsible for optimizing production processes, integrating advanced technologies, and managing resources to meet client timelines and budgets. This role is essential for delivering scalable and efficient production solutions that support Omnicom's broader marketing and communications strategies. Eduardo Legorburu's focus is on enhancing production capabilities to drive innovation and client satisfaction. The Chief Operating Officer, Omnicom Production collaborates with creative and strategic teams to ensure seamless project delivery. Legorburu's operational leadership strengthens Omnicom's capacity to produce compelling content and experiences for brands globally.

    Eduardo Legorburu - Chief Operating Officer, Omnicom Production

    Eduardo Legorburu, the Chief Operating Officer, Omnicom Production at Omnicom Group, leads the operational framework for the company's production services. Legorburu oversees the execution of production workflows, ensuring high-quality output in areas such as content creation, digital asset management, and experiential marketing. The Chief Operating Officer, Omnicom Production is responsible for optimizing production processes, integrating advanced technologies, and managing resources to meet client timelines and budgets. This role is essential for delivering scalable and efficient production solutions that support Omnicom's broader marketing and communications strategies. Eduardo Legorburu's focus is on enhancing production capabilities to drive innovation and client satisfaction. The Chief Operating Officer, Omnicom Production collaborates with creative and strategic teams to ensure seamless project delivery. Legorburu's operational leadership strengthens Omnicom's capacity to produce compelling content and experiences for brands globally.

    Udi Aharon - Chief Technology Officer

    Udi Aharon, the Chief Technology Officer at Omnicom Group, architects the company's technological infrastructure and innovation roadmap. Aharon drives the integration of advanced technologies across Omnicom's service offerings, ensuring clients benefit from cutting-edge digital marketing, data analytics, and creative solutions. The Chief Technology Officer oversees the development and implementation of scalable tech platforms that enhance operational efficiency and client engagement. This role is critical in leveraging data insights and proprietary technology to address complex marketing and sales challenges. Aharon's responsibilities include identifying emerging technological trends and translating them into actionable strategies for Omnicom's global operations. The Chief Technology Officer collaborates with various business units to ensure technology investments align with the company's strategic goals of building stronger brand-audience connections. Udi Aharon's leadership ensures Omnicom remains at the forefront of technological advancement in the marketing and communications industry.
    Udi Aharon

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    Frequently Asked Questions Regarding Omnicom Group Top Executives and Leadership Team

    Who leads Omnicom Group?
    Omnicom Group is led by John Wren (Chairman & Chief Executive Officer), along with executives such as Jonathan Nelson (Chief Executive Officer (Omnicom Digital)) and Mark O'Brien (Chief Executive Officer (Omnicom Branding)).
    Who is part of Omnicom Group’s executive team?
    The executive team of Omnicom Group includes leaders such as John Wren (Chairman & Chief Executive Officer), Jonathan Nelson (Chief Executive Officer (Omnicom Digital)), Mark O'Brien (Chief Executive Officer (Omnicom Branding)) and other senior executives.
    How many executives does Omnicom Group have?
    Omnicom Group has 12 executives leading key business areas.
    What roles are included in Omnicom Group’s leadership team?
    The leadership team of Omnicom Group includes roles such as Chairman & Chief Executive Officer, Chief Executive Officer (Omnicom Digital), Chief Executive Officer (Omnicom Branding), Chief Executive Officer, Colenso BBDO Zealand, Chief Financial Officer, Omnicom Advertising.