Our Team


Brian C. Hill, CPA -   Partner
Following his graduation from the University of North Carolina at Charlotte, Brian moved to Raleigh, North Carolina where he worked in the technology industry for a variety of technology start-ups. After relocating to California in 2004, he worked as a executive in the medical and finance industries providing management, marketing and financial solutions. Currently,  Brian provides toxicology, consulting and financial services to numerous treatment centers,  medical practices and other businesses through Orange County Toxicology and his consulting firm,  BCH Consulting, Inc. Brian holds active CPA licenses in the states of California and Nevada is a member of the California Society of CPAs, the Nevada Society of CPAs and the American Institute of Certified Public Accountants. He and his wife and three children live and spend time in Las Vegas, Nevada and Dana Point, California.


Kristyn Negrelli - Partner

Kristyn graduated from Emory University in Atlanta, Georgia in 2001. Kristyn brings to Orange County Toxicology  over 15 years of operational,  planning and transaction experience. She began her career in Atlanta, Georgia overseeing commercial and residential real estate investment transactions and has continued to assist many satisfied customers since that time. In addition to holding a real estate license, she has been providing operational solutions and and financial services to various clients for the past 10 years. Her combined medical, operations and financial background allows us to provide invaluable services to our clients and their businesses.  Kristyn lives with her family in Dana Point, CA and works with clients across the United States.

Michael Morgenstern - Partner

Mike earned a degree in nutrition and public health from New York University in 2011.  Mike provided public health and consulting services in the New York area for several years following graduation and then relocated to his home town of Newport Beach, California in 2013.  Mike, as one of the founding partners of OC Toxicology focuses on providing full-service toxicology solutions to treatment centers and and medical practices in the Orange County, CA and Los Angeles areas. Mike's combined operational and consulting background allow him to provide advanced solutions and customer service to our clients and partners at Orange County Toxicology.  Mike currently resided in Long Beach, CA.