Grierson joins drp from Automotive Marketing Consultants Inc (AMCI), where he worked as project manager, delivering customer and dealer events, product launches, incentives and training schemes.
In the past Grierson has also worked for TMG Events, where he was named on the C&IT A-List of of top 35 event professionals under 35 in 2012.
Throughout his time in the industry Grierson has worked across the retail, sports, automotive, travel, finance, and commercial sectors, with clients including Rolls-Royce Motor Cars, Nissan and Unilever.
In his new position, Grierson will be working on a number of projects for various drp clients. He said: "It is a real privilege to join an industry leading company like drp. I am relishing the opportunity of working in a fully-integrated environment with some of the best talent and most exciting clients in the sector."
Drp has said it plans to continue to expanding its team throughout 2016 and expects further growth in all areas of the business.
• For more breaking news, case studies and in-depth features, sign up to C&IT Magazine's daily Newstracker here