Technical Diving • Industrial Sensor Technology • International Business Development • Underwater Documentation
Swiss-based underwater explorer, technical cave diver, photographer and technology executive documenting remote underwater environments and exploration projects worldwide.
For more than two decades, Holger has explored alpine lakes, flooded mines, cave systems and historic wreck sites across Europe and selected international locations. His work combines technical diving, underwater photography and exploration-focused documentation in environments requiring advanced planning, precise navigation and specialized equipment.
Underwater Exploration
Holger’s exploration activities focus on remote and rarely seen underwater environments, including cave systems, submerged industrial structures, deep freshwater environments and historic wreck sites.
His work emphasizes atmospheric underwater documentation and the visual recording of geological formations, underwater passages and hidden submerged landscapes.
Technical Diving & Documentation
Technical diving projects include environments that require advanced planning, specialized equipment and structured operational procedures. These environments range from alpine lakes and flooded mines to complex overhead and cave systems.
His expeditions have taken him to alpine lakes, flooded mines, cave systems and remote underwater environments across Europe, Madagascar, Bikini Atoll, Raja Ampat and selected international locations.
Technology & Industrial Systems
Alongside underwater exploration, Holger is active in industrial sensor technology, focusing on strategic development and international business growth.
His work centers on pressure, level, temperature, flow and analytical sensor technologies used in demanding industrial and environmental applications worldwide, including process monitoring and water quality parameters.
This combination of engineering thinking and international business experience informs both technological development and structured exploration approaches.
Craftsmanship & Natural Products
Beyond technology and underwater exploration, Holger maintains a strong interest in traditional craftsmanship and natural materials. This led to the development of handcrafted soap collections under the Hexenwegle brand, produced using authentic cold process methods and carefully selected natural ingredients.
Learn more at www.hexenwegle.de
Perspective
Holger’s work connects underwater exploration, photography, technology and craftsmanship through a consistent focus on curiosity, precision and long-term engagement.
This website serves as a curated visual archive of underwater exploration, technical diving environments and documentary underwater photography documenting hidden worlds beneath the surface.
Contact
For inquiries, collaborations or expedition-related projects, feel free to get in touch.