Mark Johnston has over 18 years of experience as a laboratory analyst and manager with expertise in gas chromatography/mass spectrometry analysis of semi-volatile organic compounds, pesticides, and extractions. He currently seeks a senior-level position where he can utilize his experience supervising staff and managing a NELAC-certified laboratory. Johnston has extensive knowledge of EPA analytical methods and laboratory instrumentation including GC/MS and GC systems.

1. Mark D. Johnston
69 Smithfield Avenue
Lawrenceville, NJ 08648
Phone (610) 334-1112
E-mail: madscientist75@comcast.net
Summary__________________________________________________________________________________________________________
Senior-level laboratory analyst/manager with experience in a NELAC certified laboratory, including supervisory
responsibilities. Recent experience includes operating GC/MS and GC instruments and managing semi volatiles, pesticides,
and extractions.
Experience_________________________________________________________________________________________________________
Organics Department Manager, Eurofins QC Inc, Southampton, PA (November 2013-July 2016)
• Supervised a staff of 20+ on productivity of Semi volatile, pesticides, and extractions
• Managed on time percentage of work completed
• Performed Semi volatile analysis using Agilent 5890, 6890, 7890 Gas Chromatographs/5971, 5973, 5975 Mass
Spectrometers
• Performed method development as needed and method validation on a quarterly basis
• Knowledgeable in the use of dual micro ECD and FID detectors
• Working knowledge of Chemstation software and LIMS system
Semi Volatile Supervisor, Eurofins QC Inc, Southampton, PA (March 2004-July 2016)
• Performed Semi volatile analysis using Agilent 5890, 6890, 7890 Gas Chromatographs/5971, 5973, 5975 Mass
Spectrometers
• Performed method development as needed and method validation on a quarterly basis
• Knowledgeable in the use of ECD and FID detectors
• Working knowledge of Chemstation software and LIMS system
Semi Volatile Supervisor, PSC Analytical Services, Reading, PA (November 2000-March 2004)
• Supervised a production staff of seven in both the semi volatile analysis group and the preparatory department
• Performed Semi volatile analysis using Agilent 6890 Gas Chromatographs/5973 Mass Spectrometers
• Performed volatile analysis of air using an HP 5890 Gas Chromatograph/5971 Mass Spectrometer by Method TO-
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• Performed method development as needed and method validation on an annual basis
• Knowledgeable in the use of ECD and FID detectors
• Working knowledge of Chemstation software and LIMS system
Laboratory Analyst, Blue Marsh Laboratory, Inc., Douglassville, PA (June 1998- November 2000)
• Conducted Gas Chromatography analysis for pesticides, herbicides, polychlorinated biphenyls, diesel range
organics, EDB, and DBCP
• Knowledge in TOC analysis and Total Petroleum Hydrocarbon analysis
• Performed method development as needed and performed method validation on an annual basis
• Knowledge of sample preparation
Laboratory Technician/Office Clerk, Recra Labnet of Philadelphia, Lionville, PA (May 1998- June 1999)
• Performed duties as both an Extraction laboratory technician and Wet Chemistry technician
• Prepared samples for Percent (%) Solids, Herbicides, and Specific Conductivity
Education__________________________________________________________________________________________________________
Bachelor of Science, May 1998 Lycoming College, Williamsport, PA
• Biology major with minor in Environmental Science and Economics
• Completed course work in Organic Chemistry, Statistics, General Chemistry, and Aquatic Biology
Certification_______________________________________________________________________________________________________
Certified in Gas Chromatography/Mass Spectrometry analysis for semi volatiles in Pennsylvania and New Jersey