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Executive board from left to right: Kurt Bahm (Dipl.-Ing.), Hermann Sommer (Dipl.-Ing. -FH), Matthias Gerold (Dipl.-Ing.), Rudi Lehnert (Dipl.-Ing.), Dr Slobodan Kasic (Dipl.-Ing.), and Harald Augenstein (Dipl.-Ing.).
Executive board

Executive board

The future needs sustainable solutions.
All board members are graduates of a "Diplom-Ingenieur" engineering degree from a technical university,
are members of the Baden-Württemberg Chamber of Engineers and are therefore classified as "consulting engineers" according to the statute of the Chamber of Engineers. Our key principle is: independence and personal responsibility. In order for us to maintain full independence, no other businesses share a stake in the limited company of Harrer Engineering (Harrer Ingenieure GmbH). Similarly, Harrer Engineering has no shares in any other commercial enterprise.
Dipl.-Ing. Matthias Gerold

+49 (0) 721 1819-200
  • Chief Executive and partner
  • Head of Structural & Civil Engineering
  • Head of Special Constructions & Risk Management
  • Overall responsibility personal
  • Head of IT
  • Test engineer for structural analysis, specializing in concrete/brickwork and timber construction
  • Technical expert for the EBA (Federal Railway Authority)
  • Publicly appointed official expert for the Karlsruhe Chamber of Industry & Commerce
Dipl.-Ing. Rudi Lehnert

+49 (0) 721 1819-700
  • Associate Chief Executive and partner
  • Head of Overall Planning
  • Authorized planner in accordance with para. 43, sect. 3 of the LBO Baden-Württemberg
Dipl.-Ing. Harald Augenstein

+49 (0) 721 1819-500
  • Managing partner
  • Head of Industrial & Commercial Building
  • Authorised planner in accordance with para. 43, sect. 3, of the LBO Baden-Württemberg
Dr.-Ing. Slobodan Kasic

+49 (0) 721 1819-400
  • Managing partner
  • Head of Bridge Building, Foundation & Tunnel Construction


Dipl.-Ing. (FH) Hermann Sommer

+49 (0) 721 1819-720
  • Managing Partner
  • Commercial Director
  • Head of Project Management