Description RS Consulting Group (formerly The Richmark Group) is a provider of business-to-business marketing consulting and research services for large, midsized, and start-up companies worldwide. It helps clients develop product marketing strategies and makes recommendations on issues such as channel management, product pricing, and marketing communications. RS Consulting also provides customized market research. Founded in 1985, the company has offices in Chicago and London. The company is owned by Cello Group, a UK-based market research and consulting firm. In late 2010, Cello Group aligned RS Consulting with mruck, a market and social research firm catering to the public sector, it also owned.