G.E.O.S. Ingenieurgesellschaft mbH is an independent, mining & environmental consulting and engineering company and operates as a service provider for other companies and government authorities in many countries of Europe, Asia and Africa for more than 20 years. The company’s core activities are service solutions in the fields of geological exploration and evaluation of natural mineral and energetic resources, mine planning and approval processes, environmental impact assessments as well as maintenance and revitalisation after finished exploitation (remediation investigations and planning for mining legacies and contaminated sites, concepts for site development, landfill site planning). Besides many others, the company is highly active in the fields of mine water treatment, raw material processing and geobiotechnology, which are conducted by the department Process Development and Biotechnology. The department was and currently is actively involved in several national and European research projects and has successfully planned, operated and/or optimised several pilot plants resulting in valuable experiences for the EcoMetals project (see below).