Career Opportunities

Unfortunately, there are currently no vacancies at AtoZ-CRO. However, if you would like to send us an unsolicited application please send your full application to


  • 1984Establishment

    In 1984 Dr. med. Ernst G├╝nther Lenhard founded "DR MED LENHARD & PARTNER GmbH" as a clinical research institute.
  • 1986Services

    From the early years, studies of all clinical phases were conducted (Phase I - IV).
  • 2007Change

    In 2007 Dr. med. Karl-Peter Klein took over as the new Managing Director.
  • 2009Renaming

    In 2009 the company was renamed as AtoZ-CRO GmbH.
  • 2010Establishment

    Karl-Peter Klein has continued the success of the firm by adding new focal points during his time (e.g. USA, Asia).
  • 2014Anniversary

    AtoZ-CRO GmbH celebrates its 30th anniversary and is proud of its long tradition.
  • 2017Updates

    AtoZ-CRO GmbH is now offering world wide services and includes animal studies in its portfolio.

Member- & Partnerships

AtoZ-CRO GmbH build its activities on a vast network in the industry. We will soon add specific details regarding our Member- and Partnerships here.