Edmund Maser received his Diploma, PhD and habilitation degrees from Marburg University in pharmacology, toxicology, cell biology, molecular biology and microbiology. In 2002 he took the chair and directorship of the Institute of Toxicology and Pharmacology for Natural Scientists at the University Medical School Schleswig Holstein, Kiel, Germany. He is member of the two Clusters of Excellence “The Future Ocean” and “Inflammation at Interfaces”. The focus of his research is reductive drug metabolism where he established the field of pluripotent steroid oxidoreductases. He also identified the mechanism of steroid signaling in bacteria on a molecular level. More recently, Edmund Maser provided the first proof worldwide that dumped ammunition from both World Wars leaks toxic explosives into the marine environment. He has authored more than 180 original publications; his H-Index is 38.