Tilly is the co-founder of Think Media Group which includes Think Membership Publishing, Think Books, Think Travel and Wanderlust Travel Media. 20 years old this year, the group has enjoyed consistent independent growth and today publishes 40 magazines and websites in both the consumer and B2B spaces. The group specialises in niche markets and publishes in diverse sectors including engineering, optometry, heritage, the arts, zoology, travel, brewing, health, conservation, accountancy and management.

Tilly is also non-executive director and co-owner of Welbeck Publishing Group (formerly Carton Books), a director of L’Effet, the Luxury Shopping Rewards app, Chair of the Liberal Democrats Business & Entrepreneurs Network, sits on the Development Board of the National Youth Theatre and is the recipient of the PPA Individual Achievement Award.