He is currently the Project Director and Consultant for European CACEB wherein he is responsible for the design and construction of several new state railways in various parts of Europe .

During his career life, Dr. Herrmann was the Technical Director for the National High Speed Rail Corporation with responsibility for management, interface and overall design review of more than 100 km pre-stressed concrete bridges (earthquake design). He also worked as the Project Manager for the Copenhagen City Engineering Bureau and liaised with developers, contractors and designers for the commissioning of new buildings . Prior to this, Dr. Herrmann held Design Manager and Project Management Consultant positions for European CACEB with projects completed in Norway, Greece and other parts of Europe and Asia . He also worked as Civil/Structural Engineer, Design and Site Engineer for Giersing Rose A/S, Cowiconsult, Rambøll Denmark, F.L. Smidth, Norwegian Offshore Consultants, I - 68, Structural Engineers and Risø National Laboratory .