We recently worked together as part of a team to improve and reduce Lab Investigations for a client. Dr. Hartzfeld showed good problem solving skills and excellent technical competence in doing the Lab Investigations. Her communication skills in writing and verbally are very good.

Donna is a subject matter expert in FDA regulatory compliance. She has performed in various consulting capacities for many clients and has a reputation for getting the job done thoroughly and with a high client satisfaction. It has been a pleasure to work with her and I highly recommend Donna for her knowledge and professionalism.

Certainly when you retain a regulatory affairs consultant, you look for subject matter competence.  Donna goes well beyond that, offering company-specific advice, understanding time sensitivity, and providing the care needed in a start-up environment.  I strongly recommend her.

Donna has provided timely and effective quality management consulting to my firm over the years. She is both very knowledgeable and personable, making interacting with her productive and enjoyable.