Meet the team

Tim Chaney

Tim Chaney

General Manager - Investigation, Remediation Coordinator

Chaney has Masters and Bachelors degrees in Biology and Chemistry from Southwest Texas State University and is a Licensed Asbestos Consultant in Texas. As an environmental, health, and safety consultant Mr. Chaney provided technical expertise to numerous clients for broad ranging projects including environmental site assessments, RCRA audits, technical document development and review, and corrective action development and implementation. He has conducted research, drafted technical reports, and provided expert testimony to law firms in need of environmental, safety, and basic scientific expertise.

Sergio Sanchez

Sergio Sanchez

Regional Manager East Texas

Sergio has over 13 years of experience in the environmental consulting industry with specific emphasis on project management. Sergio's areas of technical expertise include asbestos, mold, and lead inspections, turnaround support services, asbestos surveys, air monitoring, and safety audits. He is primarily responsible for the day-to-day management of the Turnstone EH&S, Inc. Houston and East Texas Regional operations, including client relations, field management interface, and continued business development and oversight. Sergio is an experienced environmental professional recognized by the state of Texas as a licensed Asbestos Project Manager, Asbestos Air Monitoring Technician, and Asbestos Building Inspector, and is an Authorized Asbestos Training Instructor.

Melanie Fox

Melanie Fox - Regional Manager South Texas

Regional Manager South Texas

Melanie Fox has over 20 years experience as an Environmental Coordinator and Industrial Hygiene Technician, and is also a Nuclear Regulatory Commission (NRC) Certified Radiation Safety Officer (RSO). Mrs. Foxs areas of expertise include: hazardous waste management, public water supply quality control (Class D Water Operator), waste water compliance and reporting, ergonomics assessment, safety auditing, and indoor air quality (IAQ) and Leadership In Energy and Environmental Design (LEED) Green Building testing. Ms. Fox has provided these services to petrochemical refineries, other chemical industries, and maintenance contractors servicing various business sectors.

Dr. Brent Mattox

Dr Brent Mattox

Corporate Industrial Hygienist

Dr. Brent Mattox brings over 30 years of experience in environmental and occupational health to Turnstone. He has a Bachelor of Science degree in Botany from Marshall University, a Master of Science in Industrial Hygiene from the University of Central Missouri, and a Ph.D. from the University of Missouri in Leadership and Policy Analysis. Work experience includes development and management of industrial hygiene programs, and as a consultant in industrial hygiene. Areas of expertise include IAQ, OSHA VPP, general industrial hygiene, and health and safety program development. He is a Certified Industrial Hygienist (CIH), a Registered Sanitarian, and is a Licensed Mold Assessment and Asbestos Individual Consultant.