Lambert & Co. has acquired The Vandiver Group, Inc. (Vandiver), a St. Louis-based strategic communications and market research firm. The deal marks Lambert's fourth transaction in the last two years, fueling its integrated service offerings and expanding its talent bench. This acquisition was facilitated by The Stevens Group. 

"We are always looking for great talent and acquisitions is one way we can complement and catapult our strategic goals," said Jeff Lambert, founder and CEO of Lambert & Co. "I have known Donna for several years and this acquisition is a culmination of a relationship driven by values alignment and strategic fit."

"Jeff and I have been peers within the communications industry and have developed a strong relationship through our partnership for many years in PROI Worldwide. We've watched their growth and how they've stayed true to their vision. We'll now be able to offer additional services and diverse perspectives, while continuing the award-winning work we have always produced," said Donna Vandiver.