Mark O'Brien - Email & Phone Number

CEO, Omnicom Brand Consulting Group at Omnicom

Mark O'Brien is based out of Florham Park, New Jersey, United States and works at Omnicom as CEO, Omnicom Brand Consulting Group.

Mark O'Brien's Contact Information

Mark O'Brien's Work email

m*****@omnico***.com

Valid

Latest update

October 27, 2025

Location

Florham Park, New Jersey, United States

Mark's current employer

Omnicom

Description

A global leader in marketing communications, Omnicom provides brand and advertising services to over 5,000 clients in over 100 countries.

Website

omnicomgroup.com

HQ Location

New York, NY, United States

Number of employees

10001+

Industry

Advertising Services

Latest update

April 30, 2024

Read about Omnicom

Frequent questions about Mark O'Brien

What company is Mark O'Brien working for?

Mark O'Brien works for Omnicom.

What is Mark O'Brien's function at Omnicom?

Mark O'Brien is CEO, Omnicom Brand Consulting Group at Omnicom.

Where is Mark O'Brien based?

Mark O'Brien is based out of Florham Park, New Jersey, United States.

What is Mark O'Brien's work email address?

Mark O'Brien's professional email address is m*****@omnico***.com

What's the ticker symbol of Omnicom?

Omnicom's ticker symbol is OMC.

Who are Mark O'Brien's co-workers?

Mark O'Brien's colleagues are Abaetê Azevedo, John Doolittle, Christoph Bornschein, Bill Marovitz, Ro Mehoo, Adam Fowler, Jamie Lee, _Uмєя Гαʝα_, Stacey Hightower, Tina Posey, Tul Hari, Ed Wise, Frank Kochenash, Leila Cunliffe, Luke Taylor, Chris Foster, Ali Pulver, Jonathan Nelson, Emma Sergeant, Rick Carney, Pete Swiecicki, Aparna Sarma, Leslie Chiocco, Hannah Katz, Alberto Camacho, Adrian Sapollnik, John Hamilton, Ben Jaffe, Rochelle Tarlowe, Deena Ghaly, Zaid Rashid, Alejandro Mercado, Jack Virdee, Hana Pérez, Randall Weisenburger.

Mark's co-workers

Abaetê Azevedo

Former CEO Rapp

John Doolittle

President & , Diversified Agency Services

Christoph Bornschein

President of Digital Strategy, Business Development & Growth in Germany

Global CX Product & Capability Owner

Jamie Lee

Chief Executive Officer

_Uмєя Гαʝα_

Chief Executive Officer

Stacey Hightower

Chief Executive Officer of Omnicom Specialty Marketing Group

Tina Posey

Chief Executive Officer – Javelin Agency

Tul Hari

CEO

Ed Wise

CEO Omnicom Health Group

Frank Kochenash

CEO, eCommerce, Omnicom

Leila Cunliffe

EA to President, Europe - DAS

Luke Taylor

CEO of Omnicom Precision Marketing Group

Chris Foster

CEO Omnicom Public Relations Group

Ali Pulver

Global President, Omniwomen

Jonathan Nelson

CEO, Omnicom Digital

Emma Sergeant

President Europe DAS Group of Companies, Managing Partner ONE HUNDRED Europe

Rick Carney

CIO - Shared Services

Pete Swiecicki

SVP, Director of Business Operations

Aparna Sarma

VP Commercial Operations, DAS

Leslie Chiocco

VP, Human Resources & Retirement Benefits

Hannah Katz

Administrative Coordinator

Alberto Camacho

Cloud Engineer

Adrian Sapollnik

Executive Vice President, Strategy & Corporate Development

John Hamilton

Vice President, Finance and Corporate Development

Ben Jaffe

VP, Commercial Business Director

Rochelle Tarlowe

SVP & Treasurer

Deena Ghaly

Vice President, Corporate Development

Zaid Rashid

EVP, Digital Operations

Alejandro Mercado

Regional CIO Latam

Jack Virdee

VP Finance and Operational Excellence

Hana Pérez

SVP Business Development North America at DAS Group of Companies, A Division of Omnicom Group

Randall Weisenburger

EVP & CFO

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