Our Team

Charles W. Terrell, CIH, CHMM, REP

President/Technical Director

Charles started Terrell Technical Services, Incorporated, on January 16, 2003. Working from home, the initial intent, was to provide a select group of clients on-call environmental, health, and safety support. Within two months, demand had increased to the point that additional employees had to be hired and a commercial office leased. The company has continued with steady growth and diversification of services.

Throughout his early career, Charles was employed by a number of environmental consulting and laboratory firms providing him with broad-based experience. Charles was blessed to participate in and manage a wide range of projects, such as EPA compliance air emissions/stack testing, OSHA compliance industrial hygiene surveys, groundwater assessments, soil assessments, underground storage tank assessments, hazardous materials assessments, real estate transaction environmental site assessments and laboratory services.

Charles graduated with a Bachelor of Science degree from the University of Alabama in Huntsville with core studies in Biological Sciences, Environmental Sciences, and Chemistry. While attending UAH, he met his future wife and best friend, Debra. They have two sons, Elliott and Eric, who are carrying on the family businesses. Charles enjoys spending time with his family, fishing, hunting and improving their farms.

Shannon Sutton, CIH, CHMM, REM

Vice-President/Technical Director

Shannon graduated with a Bachelor’s Degree in mathematics from the University of North Alabama in 1992. Shortly thereafter, he completed additional degrees in industrial hygiene and chemistry. After an internship as an industrial hygiene technician at a chemical company, Shannon entered the environmental, health, and safety consulting field where he has remained since 1996. In 2005, Shannon joined Terrell Technical Services as the Vice-President/Technical Director where he has been a part of the company’s rapid expansion.

As Technical Director, Shannon provides guidance to the industrial hygiene and environmental project managers and technicians in the company. Shannon oversees and is actively involved in the anticipation, recognition, evaluation, and control of employee exposure hazards including airborne contaminants, noise, asbestos, nonionizing radiation, lasers, combustible dusts, and other health and safety hazards. He has performed extensive occupational risk assessments involving confidence interval, Bayesian, control banding, and other mathematical and statistical exposure assessments as well as dermal exposure and EPA-related risk assessments. He has established quality assurance programs under the ANSI/ISO 17025 standard for the Competence of Testing and Calibration Laboratories as well as performing internal audits for ISO 9001 (Quality Management Systems) and ISO 14001 (Environmental Management Systems). Shannon has experience dealing with issues such as indoor environmental quality, OSHA regulations, EPA and DOT requirements, Phase I and II Environmental Site Assessments, hazardous materials spill responses, Toxic Substances, and Control Act, and clandestine methamphetamine laboratory assessment and cleanup.

Shannon and his wife, Karen, have been married since 2002. When he is not working, Shannon enjoys playing tennis, landscaping, playing guitar, supporting animal rescue organizations, and spending time with family and friends.


Vice-President / Director of Operations

Neil has been employed by Terrell Technical Services, Inc. (TTSI) as the Vice President of Operations since 2006. Upon graduating from Southwest Texas State University in 1999 with a B.S. in Biology, Neil has worked in the environmental consulting field with various engineering firms in North Alabama. Neil has had the privilege of being involved with a variety of projects over the course of his career including groundwater monitoring, wastewater operations, air emissions/stack testing, industrial hygiene surveys, health and safety, hazardous spill response, and indoor air quality.

Over the past 10 years, Neil’s work has primarily been indoor air quality and industrial hygiene related services. While Neil’s current position includes the operations oversight of all aspects of TTSI, his day-to-day role is primarily as the Senior Project Manager for the indoor air quality division of TTSI. Neil is frequently asked to provide expert witness testimony in indoor air quality-related cases and speak at various professional organizations about indoor air quality issues.

Shortly after moving to Alabama from Texas, Neil met and married his wife Kimberly, an accomplished professional in the aerospace industry. When not working, Neil enjoys spending time with family and friends – particularly when it involves fishing, hunting, boating, golf, or traveling to new places.

Michael Gray, CIH, CIEC, CHMM

Assistant Director of Operations

Michael began his career at Terrell Technical Services, Inc. (TTSI) in 2008, after graduating from the University of North Alabama with a B.S. in Geology. While working at TTSI, Michael has managed a variety of environmental, health and safety projects, including industrial hygiene survey, asbestos related services, ground water monitoring, UST closure, clandestine methamphetamine laboratory assessments, indoor environmental quality assessments, etc. Expert witness testimony has been provided by Michael multiple times for indoor air quality cases. Tasks for Michael over the past ten years have primarily been involved with the indoor air/environmental quality division of the company as well as daily operations oversite. When Michael and his lovely wife, Lauralee, who is a banking professional, are not at work, their time is spent with friends and family, golfing, and on the lake.

Kiley Robinson, CHMM, REM, CPESC, CSEM

Project Manager

Kiley has worked in the environmental field in both industrial and consulting facilities since May 2001. Kiley oversees environmental projects and provided environmental management expertise for Terrell Technical Services. Kiley currently hold certifications as a Certified Hazardous Materials Manager (CHMM #25169), Registered Environmental Manager (REM 351280), Certified Professional in Erosion and Sediment Control (CPESC #3943), and Certified Safety Environmental and Emergency Manager (CSEM 893445). Project experience includes researching and conducting Phase I and Phase II Environmental Site Assessments, management of environmental projects such as asbestos, soil investigation/remediation, installation, development and sampling of groundwater monitoring wells, RCRA hazardous waste management and disposal, and Environmental, Safety and ISO compliance audits. Kiley has worked with environmental regulatory issues such as hazardous waste and the Resource Conservation & Recovery Act (RCRA), Superfund Amendments & Reauthorization Act (SARA0, Toxic Substance Control Act (TSCA), Emergency Planning & Community Right to Know Act (EPCRA), Occupational Safety & Health Administration (OSHA), and the National Pollutant Discharge Elimination System (PEDES) permit program. Kiley enjoys hunting, fishing, gardening and spending time with her family.