After graduating from high school, Daniel Westerholt completed an apprenticeship as a landscape gardener in gardening and landscaping, followed by two years as a foreman. He then began studying landscape and open space planning at Gottfried Wilhelm Leibniz University Hannover (LUH), where he specialized in the technical and structural fundamentals of open space planning, particularly construction and vegetation technology in landscape architecture.

After graduating, Daniel Westerholt worked for four years as an application engineer in a green roof company, where he focused on consulting. He then began a six-year scientific collaboration and also worked for ten years as a lecturer at the Institute of Landscape Architecture. His research focused on “green roofs” and “evaporation” in the field of technical and structural fundamentals of open space planning.

At the same time, he worked part-time for six years in horticultural administration at the State Capital of Hanover in the Herrenhausen Gardens department. Daniel Westerholt then took on a 17-month position as a consultant at the Federal Association for Green Buildings (BuGG), where he promoted topics related to building greening in training seminars and lectures.

On January 1, 2023, he began his professorship in vegetation technology in landscaping at Geisenheim University.