About us

knoell USA, LLC, is a contract research organization serving the regulated scientific communities in the crop protection and chemical industries.

Established in 2001 under the original name of Critical Path Services, knoell USA is a consulting company that serves the regulated scientific community. The company’s clients range in size from multi-national Fortune 500 companies to virtuals and start-ups. Our continued year-over-year revenue growth earned us a position in the INC 5000 for 2011 and a CRO Leadership Award in 2012. As part of the global network of knoell companies, we provide expertise when and where you need it so you can move your business forward.

Headquarters, Garnet Valley, PA

Our regulatory and executive teams are based in our Garnet Valley, PA facility.  On site and nearby at several client sites are experts in regulatory affairs, registrations, dossier services and technical writing, quality assurance, and much, much more.  

Research Triangle Park, NC

Since 2013, knoell USA began offering services through our new facility in RTP, NC.  In the heart of the Triangle just minutes from key clients, our NC office provides quality assurance, dossier and technical writing, study direction, registration, and biotechnology consulting services.

The knoell network: worldwide experts

We offer a comprehensive, modular service portfolio based on the unique "Glocal Concept": worldwide industry sector know-how with experience in the key global markets – and local presence at your company. Discover the knoell network: