Gail Grueser


SCT was co-founded in 1999 by President Gail Grueser. Under her direction, SCT has developed into a world-class organization providing comprehensive occupational safety and health solutions.

Grueser received her Bachelor’s Degree of Arts from Cleveland State University and went on to earn her Master’s Degree of Education from Kent State University. As a licensed Substance Abuse Professional, Social Worker and Educator, Grueser brings a wealth of knowledge to her clients, ensuring they receive the assistance needed to keep their workplace safe and healthy.

Grueser is responsible for the development and measurement of key performance indicators to monitor company operations. She works closely with senior staff to ensure proper policies are in place for effective administration.

In addition to her administrative responsibilities, Grueser directs SCT’s Occupational Health Services division, which provides training, medical monitoring and drug screening.

Joseph Ventura 

General Manager

SCT’s team of senior safety professional is directed by General Manager Joseph Ventura, a certified safety and health professional with more than 20 years of experience in the field of Industrial Hygiene.

Ventura received his Bachelor’s Degree from Cleveland State University and later his safety and health certification from Eastern Michigan University. He developed an expertise in industrial hygiene and employee training through his work with the International Union of Painters and Allied Trades, IUPAT. There he worked on developing and directing the Occupational Safety and Health Department for the IUPAT DC6.

In addition to his management responsibilities at SCT, Ventura also serves as the principal industrial hygienist, providing expert witness services as well as employee training.

Rob Medlock

Senior Vice President

Rob Medlock is Senior Vice President of SCT. Under his direction, Medlock and his team as assisted clients in overcoming costly OSHA citations and third party claims.

Medlock studied at Indiana State University where he received his bachelor’s degree in Safety Management. He began his career with OSHA as a Student Intern, and during the next 14 years he moved through the ranks as a Compliance Officer, State Plan Monitor and Supervisor working in Kentucky, Illinois and Ohio. In October 1991, he was selected as Area Director for the Cleveland Area OSHA Office, where he served until his retirement in 2011.

During his tenure as OSHA Area Director, Medlock led his office in conducting more than 17,000 inspections and implemented several OSHA Emphasis Programs, including a Construction Fall Hazard program that was adopted nationwide by OSHA. Medlock has been a recipient of the “OSHA Champion of the Year Award” and the “Distinguished Career Service Award.”

With more than 33 years of experience as an OSHA employee and 20 years as the Cleveland OSHA Area Director, Medlock is a proven expert in the field of occupational safety. At SCT, Medlock is responsible for directing and supervising a staff of professionals to provide high level occupational safety and health expert witness services.


Dragan Savic, CHST

Vice President of Glass Technology
and Safety Staff Augmentation

Dragan Savic trains and manages SCT’s team of safety technicians. He is a certified Construction Health and Safety Technician (CHST) and is responsible for project management of glass and steel furnace demolition/rebuild projects. Savic has more than a decade of experience working in the glass industry.

In addition to his management responsibilities, Savic performs Industrial Hygiene-related surveys as a coating inspection specialist (NACE level 1) and is also part of the SCT safety and health training team.

Since joining SCT in 2004, Savic has gained extensive knowledge and experience in the areas of OSHA excavation, trenching, shoring, fall protection, fall arrest systems, scaffolding, lead abatement, mold, indoor air quality, and respiratory protection. He has performed more than 600 safety audits to determine OSHA compliance, and has developed site-specific safety and health plans for both construction and general industry.

Nick Walters, CHST

Vice President of Safety Engineering Services

Under his direction, Mr. Walters and his team assist clients in overcoming costly OSHA citations and third party claims.  Mr. Walters has extensive occupational safety experience in a wide variety of industries and he is a certified Construction Safety and Health Technician (CHST).

Mr. Walters graduated summa cum laude from Norther Illinois University in DeKalb, Illinois with a Bachelor of Science in Industrial Technology – Safety.  He began his career with the Occupational Safety and Health Administration (OSHA) in 1992.  Over the course of fourteen years, Mr. Walters worked as a Compliance Officer, Whistleblower Investigator, and Regional Audit Team Leader in the Aurora, Peoria, and Chicago, Illinois Offices.  In 2006, he was selected as the Area Director for the Peoria OSHA Office.  Mr. Walters was named the Deputy Regional Administrator in 2010 and was then appointed Regional Administrator in 2012 for the Chicago Regional Office, where he served for four years.

As Regional Administrator of the largest OSHA Region in the nation, Mr. Walters was responsible for overseeing all OSHA programs within a six state Region consisting of Illinois, Indiana, Michigan, Minnesota, Ohio, and Wisconsin.  He oversaw some of the largest OSHA enforcement cases in the country, including those involving multimillion dollar penalties, criminal prosecutions, use of Section 11(b) of the OSH Act, multiple fatalities, and catastrophes.  He also served on numerous OSHA Executive Steering Committees that provided guidance on the establishment of national OSHA enforcement, whistleblower, and compliance assistance policies.  Mr. Walters led the Agency’s participation in numerous emergency response events including, oil spills, tornados, and train derailments.  He worked in close collaboration with employers, associations, and workers to promote safe workplaces through OSHA Partnerships, Alliances and the Voluntary Protection Program (VPP).

Additionally, Mr. Walters served as the Director for OSHA’s Directorate of Training and Education in Arlington Heights, Illinois.  In this position, he oversaw the training and development of all Federal and State Plan Compliance Officers, Whistleblower Investigators, Consultants, and Federal Managers through the OSHA Training Institute (OTI).  He was also responsible for administering the OTI Education Center Program, the OSHA 10 and 30 Hour Outreach Training Program, and the Susan Harwood Training Grants.

With 25 years of experience with OSHA, Vice President, Nick Walters is a proven expert in the field of occupational safety.  At SCT, Mr. Walters is responsible for directing and supervising a staff of professionals to provide high level occupational safety and health expert witness services.

Dennis Hobart

Director of Construction Services

With 18 years of experience in the field of trenching and excavating SCT safety and health professional Dennis Hobart has spent his career designing and maintaining safe trenches on job sites across Ohio.

In addition to his work in the field, Hobart has trained thousands of construction, industrial and municipal workers as well as emergency professionals in excavation safety and trench rescue.

Joining SCT in 2014, Hobart performs safety and health audits of trenching sites and is part of SCT’s safety and health training team, where he teaches OSHA 10- and 30-hour courses as well as trenching and excavating safety.

Tom Bielema

Regional Director 

Mr. Bielema’s main area of expertise at SCT is in our Expert Witness Services department. Mr. Bielema’s experience working within and outside the structure of the U.S. Occupational Safety and Health Administration make him a definite asset to the SCT Team.

Mr. Bielema began his career in occupational safety and health in 1994 as a student intern with the Occupational Safety and Health Administration (OSHA). After graduating from Purdue University, he joined OSHA full time in the Peoria Area Office in Peoria, Illinois, where he spent the next 12 years as a Compliance Safety and Health Officer.

During his tenure at OSHA, Mr. Bielema monitored safety in a variety of industries, including manufacturing, service, transportation, alternative energy, agriculture, grain handling, meat packing, health care, and numerous types of light, commercial, and heavy construction.

Mr. Bielema left government service in 2006 to serve as safety and heath manager for a large logistics and parts distribution center. This move to the private sector gave him a new skill set for understanding how to manage and direct safety in a variety of scenarios, including managing a multi-shift team, performing weekly training classes for new hires, medical/injury management, and motivating workers to embrace safety.

In 2007 Mr. Bielema returned to OSHA to serve as Assistant Area Director in the Peoria Office. He became Area Director of the Peoria OSHA Office in 2010 and served in that position until joining SCT in late February 2017. During his management service at OSHA, Mr. Bielema lead a team of highly skilled professionals in the 81 counties of Central and Southern Illinois.

Using his OSHA expertise, Mr. Bielema also joins Mr. Medlock and Mr. Walters on staff for expert witness services. With our staff’s extensive OSHA and safety background, SCT is uniquely poised to offer expert witness services to clients seeking assistance with OSHA compliance and inspections.

John Tuisl, ARM, CRIS

National Director of Risk Management Services

Mr. Tuisl holds the ARM (Associate in Risk Management) and CRIS (Construction Risk Insurance Specialist) designations and spearheads SCT’s risk management services.

In addition to his risk management oversight, Mr. Tuisl assists our OSHA expert witness staff with litigation management, loss investigations, and claims management.

Mr. Tuisl began his career as a Combat Engineer in the U.S. Army from 1986 to 1989. He then went on to receive his Bachelor of Science in Industrial Technology with a minor in safety at Northern Illinois University in 1992.

Starting as a Risk Management Department Safety Engineer, Mr. Tuisl worked his way up the corporate ladder working in the public and private sectors as a Chief Safety Officer, Corporate Risk Manager, Area Executive Vice President, Director of Risk Management, and Vice President of Risk Management and Safety.

Most recently, Mr. Tuisl provided risk management support to construction clients and large project teams as Senior Vice President/Central Region Account Executive Leader at Aon Construction Services Group, which he joined in 2013.

Mr. Tuisl’s areas of expertise include OCIP/CCIP Project Solutions, Claims Resolution, Large Project Risk Management Solutions, Construction Risk Management and Safety, Contracts Evaluation, and Builders Risk and Casualty.
He is also a former 10-hour OSHA Outreach Instructor for the Chicagoland Construction Safety Council.

Dr. Thomas Markham, M.D.

Corporate Medical Director

SCT’s Medical Review Officer (MRO) Dr. Thomas Markham, M.D., is a former Medical Officer in the United States Navy with a background in Occupational and Environmental Medicine.

Dr. Markham graduated from St. Louis University School of Medicine and went on to serve his residency in Occupational Medicine at the University of Michigan Institute of Industrial Health.

During his career in Occupational Medicine, Dr. Markham led and co-sponsored beryllium-related research, which led to several scientific advances in the understanding of beryllium diseases. Currently, Dr. Markham serves as Chairman on the U.S. Department of Energy/ORISE Beryllium Health Surveillance Advisory Committee.

Richard Lombardi

PE/Vice President

Heading SCT’s Engineering Department is Richard Lombardi, a Registered Engineer Certified by the National Council of Examiners for Engineering and Surveying. Lombardi received his bachelor’s degree in Engineering Technology from Ohio State University and a bachelor’s degree in Mechanical Engineering from Fenn College.

A registered Professional Engineer in 30 states, Lombardi has more than 30 years of experience in mechanical and electrical design, project management, business development, and project coordination.

As a project manager, project engineer and designer for both public and private sectors, Lombardi has developed an extensive background in building and site design, business development, contract documents, building inspection, commissioning and analysis, and construction administration.



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