Acumen was founded in 2002 and has worked across a number of sectors, with "a particularly strong track record in working with organisations in the emerging technologies and innovation, bioscience, professional services, higher academia and the oil & gas sectors", according to the press statement announcing McLean’s retirement.
McLean has been in PR for 36 years – having previously worked in tourism – and prior to setting up Acumen spent seven years working in-house for PwC, including leading its PR and marketing team in Scotland.
Dorrian, who will lead the business on his own from October, said: "The focus will continue to be on those sectors in which we have developed a good reputation and on supporting clients across traditional and digital communications channels.
"Alistair and I first met and worked together 25 years ago in a previous consultancy and he has to be considered one of the safest pairs of hands in the Scottish PR industry. He has helped build the Acumen brand to become a strong mid-tier PR consultancy and he is widely respected by clients and journalists alike."