What is mitchell communications group? Award-winning, full-service, flagship public relations agency of Dentsu. Mitchell (Mitchell Communications Group) is an award-winning strategic communications firm, working on a national and global scale with some of the world’s largest companies and best-known brands.Why work with mitchell? When you work with Mitchell, you join a roster of some of the world’s largest companies and best-known brands. We build. real connections. Mitchell specializes in creating communications strategies that are tailored to each and every audience you want to reach.How do i contact mmc? Contact MMC. If you have any questions or comments, please contact us via email or phone. Email: [email protected] Phone: (972) 215-5040 Corporate Headquarters.Why mitchell dentsu? Mitchell is a part of Dentsu, whose best-in-class agencies provide marketing and communications solutions through collaboration, innovation and entrepreneurism. With more than 300 offices in 110 countries, Dentsu leverages its global talents and capabilities, continually reinventing ways to make clients more successful.