She has worked in the tourism and attractions industry for more than 20 years. Lehmann was the chief operations officer for the Zeitz Museum of Contemporary Art Africa and opened the iconic museum to the public in September 2017.

Prior to this, she was the managing director of Table Mountain Cableway for more than eight years. During her tenure as MD, she drove the successful international three-year campaign to have Table Mountain voted as one of the New7Wonders of Nature.

Lehmann currently runs her own consultancy, Curiositas, focusing on understanding and managing visitor attractions and experiences as well as the future of the tourism industry. Lehmann's passion is the art and science of attractions management.

Lehmann holds a BSc (Log), an MBA and a Masters' Degree in Futures studies. Her thesis Understanding the motivations of future middle-class domestic travellers to visit local attractions in South Africa received a cum laude.

Lehmann is a board member of the Groot Constantia Trust. She is a research associate for the Institute of Futures Research at Stellenbosch University and participates in the Global Scanning Network for the Copenhagen Futures Institute. Lehmann is on the government relations sub-committee for the International Association of Amusement Parks and Attractions Europe, Middle East and Africa.

Lehmann is a contributing author for the book: Managing Tourism in SA, having written a chapter on Managing Visitor Attractions. Follow Lehmann on Twitter at @CityBowlKid.