Marjan Pipenbaher (born 22 August 1957) is a Slovenian structural engineer and bridge specialist.
Pipenbaher graduated from the Faculty of Civil Engineering, University of Maribor in 1981.
The practice is led by Markelj and Pipenbaher, and has constructed many high-profile bridges.
Since 2002, he is also founder and CEO of specialized design and research company Pipenbaher Consulting Engineers.
He is a lecturer at the Faculty of Civil Engineering in Maribor since 2000, in the field of prestressed concrete structures and bridges.