For over 30 years, the Leyden Group associates have worked with a broad range of companies seeking professionals with experience in toxicology, risk assessment, product safety, pathology, and more. As the nation’s most active search firm in these disciplines, we have filled over 600 positions across many industries including pharmaceutical, chemical, consumer product, consulting, and more. Our toxicology and related work spans early career to executive level recruitment, with a concentration on North American companies.