Lawson joins from Seven Investment Management and will report to managing director of distribution Edward Troughton.
Lawson will work with Troughton to build the newly formed asset management arm of Alliance Trust, with new products and services expected.
He helped found 7IM back in 2001, prior to which he was a senior investment adviser at Barclays Stockbrokers and was responsible for the advisory stockbroking business.
Troughton says: “These are exciting times for our group. I am delighted that Alliance Trust Asset Management has been able to attract someone of Benedict’s experience and calibre. Benedict is an integral part of our newly formed dedicated asset management team.”