Hoffman has held responsibilities at board and management levels of such companies as Selfridges and Le Printemps, as well as helping to advise and build fashion and beauty brands such as Nicholas Kirkwood and Charlotte Tilbury.
TCS founder Julietta Dexter told PRWeek that the business, which employs 110 people, has "grown steadily and strongly" in recent times, with growth in the digital practice, the VIP & Talent Services division and in-house design. Recent client wins have included Rolls-Royce, Leading Hotels of the World, Investec and Charlotte Tilbury.
"We are growing our service offering as strategic brand builders and communicators. Added to this a number of interesting global opportunities are being presented to us through existing clients and new business leads."
Dexter said Hoffman is joining "to help us navigate through our next phases of development".
"As we work more and more globally with our brands in all areas from advertising campaigns through to e-commerce, from reputation management to global digital strategies, an external pair of eyes with deep industry knowledge is no doubt going to challenge us, make us more efficient and encourage us to seek exciting opportunities for the company, its clients and its people."
Hoffman said: "The media landscape is constantly changing and TCS is leading the way in closing the gap between old-style agencies, clients in luxury and other sectors and the evolving needs of their audiences."
The agency’s existing clients include The Net-a-Porter Group, John Frieda, Max Mara and Banana Republic.