We provide testing services to certify product and materials compliance, support quality control, and ensure the health and safety of workers and their environment. We provide assistance for clients who are not sure what tests they need. Our accredited materials characterization laboratory is the foundation of all the services of RJ Lee Group provides, including standardized testing for compliance, industrial hygiene and environmental analyses, quality control, and materials research and development.

We provide credentialed expertise supported built by robust scientific data. We provide significant support to industrial clients for product development, industrial hygiene and overall production support.

RJ Lee Group maintains a visible and respected reputation within the legal community, having offered scientific support in civil litigation matters for nearly 30 years. 

  • Product Liability 
  • Toxic Tort
  • Construction Defect
  • Fugitive Emission
  • Personal Injury
  • Patent Infringement
  • Contract Disputes
  • Insurance Subrogation

Subject Matter Experts

From our core business of providing scientific solutions to our clients, we have developed innovative products. Some are produced internally, and some have arisen from partnerships with other research organizations. 

For example, we build lab software solutions to help manage and streamline your labs data, and environmental testing products for a variety of applications. 

  • IntelliSEM is a powerful automated particle analysis system.
  • ParticleID is  a customizable cloud hosted web application used to identify foreign particulate matter and  assist with root cause investigations. 

Other products we create count particles and help keep the air and environment safe.

RJ Lee Group is a materials analysis laboratory and consulting company which serves many different industries. We offer scientific solutions such as industrial forensics services, laboratory and testing services, litigation support, and laboratory software to many industries:

Tarah Helsel

Tarah Helsel is a Forensic Scientist and testifying expert at RJ Lee Group. She is an expert in the preparation, analysis, interpretation and reporting of gunshot residue (GSR) evidence using Scanning Electron Microscopy/Energy Dispersive Spectroscopy (SEM/EDS). Ms. Helsel is also an active member of the team responsible for RJ Lee Group’s successful laboratory accreditation by ANSI-ASQ National Accreditation Board in the areas of Trace Evidence – Gun Shot Residue and GSR Distance Determination. Utilizing near-infrared spectroscopy to create a reference library of spectra, she also has researched the instrumentation and its relevant pharmaceutical applications.

Ms. Helsel has experience testifying for the defense and prosecution, and is accepted as an expert in the area of GSR in Kansas, Maryland, Delaware, Louisiana, Michigan, Hawaii, Washington, Florida, Pennsylvania, California and Nebraska as well as Bermuda. She is a member of the Mid-Atlantic Association of Forensic Scientists (MAAFS) and the American Society of Trace Evidence Examiners (ASTEE).


Contact Tarah Helsel


To read publications, Materials Insights and blog articles by this expert, please click here.



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