Technical Leadership

Clifton's technical leaders and specialists guide our earth science, environmental, materials, civil, and mining engineering practices. 


  • Wayne Clifton, DSc PEng

    Chief Executive Officer

  • Paul van der Raadt, MSc PEng


  • Dave Kent, MSc PEng

    Chief Engineer

  • Ertan Ozmen, MSc PE PEng

    VP Engineering Operations

  • Jason Gasmo, MEng PEng

    VP Engineering Operations, Director Materials

  • Allen Kelly, MSc PEng PGeo PGeol

    Director Earth Sciences

  • David Pritchard, PGeol

    Director Environmental

  • Ryan Jestin, PEng

    Director Civil Engineering

  • Leon Botham, MSCE PEng

    Director Mining