Senior Laboratory Chemist
Location: Edison, NJ
Status: Full Time
Travel: Up to 10%
Salary Range: $90,000 – $100,000 (depending on experience)
Weston is seeking an experienced Senior Laboratory Chemist to support the EPA Response 
Engineering Analytical Contract (REAC). The REAC program provides critical support to the 
EPA during environmental emergencies and Superfund projects. Our work directly supports 
emergency response efforts through environmental testing and monitoring, with the 
overarching goal of protecting the environment and the health and safety of workers and the 
public.
This role involves performing environmental gas chromatography/mass spectrometry 
(GC/MS) analyses of organic compounds in a variety of sample matrices, including air, soil, 
water, and oil. Samples are often collected during time-critical emergency responses and at 
complex environmental remediation sites.
Work is conducted in both fixed laboratory environments and mobile laboratory 
deployments, supporting investigations related to major environmental and emergency 
response events such as 9/11, Hurricane Katrina, California Wildfires, and other natural or 
industrial disasters. 
The Senior Laboratory Chemist will serve as a technical expert, collaborating closely with 
clients and project teams. This is an excellent opportunity for a seasoned chemist who 
enjoys managing projects from initiation through completion and thrives in dynamic, 
mission-driven environments.
Key Responsibilities
Perform GC/MS analyses in both mobile and fixed laboratory settings.
Conduct analyses using EPA methods such as 8260, 8270, TO-15, and 8082A.
Prepare standards, reagents, and environmental samples.
Interpret mass spectral data using spectral libraries to identify compounds.
Generate clear, accurate, and concise analytical reports.
Perform routine instrument operation, calibration, maintenance, and troubleshooting.
Develop and validate analytical methods using GC with detectors such as FID, PID, and 
MS.
Prepare samples using techniques such as liquid-liquid extraction, Soxhlet/Soxtherm 
extraction, and solid-phase extraction.
Safely manage and handle hazardous materials in a laboratory setting.