Exceptional minds. Diverse expertise. Click on the links below to learn more about the expert scientists of Gateway Analytical.
- David Exline, Senior Vice President
- Oksana Olkhovyk, Ph.D., Senior Scientist
- Cara Plese, Forensic Scientist
- Antonio Scatena, Laboratory Manager
- Rebekah Wagurak, Forensic Scientist
David Exline, Senior Vice President
M.S., Forensics Science; University of Alabama at Birmingham, 1995
B.A., Biology; Slippery Rock University, 1993
David Exline has more than 15 years of experience in managing and administering analytical laboratory and consulting services. As Senior Vice President of Gateway Analytical, he oversees the company’s day-to-day operations, business growth and service areas.
Although familiar with analytical practices in several industries, David’s expertise lies in the forensics, materials science and pharmaceutical realms. As a court-qualified expert in the area of trace evidence examination, he has instructed law enforcement agencies, attorneys and students in the collection, preservation and examination of various types of trace evidence, including hairs, fibers and paints. In addition to his forensics background, David is adept in numerous pharmaceutical-related services and testing methods including: materials characterization, particulate contamination analysis, particle sizing and high-resolution microscopy.
Scanning electron microscopy, light microscopy, XRD, Fourier transform infrared spectroscopy and Raman spectroscopy. Expertise also includes experience in implementation of ASTM and USP testing methods.
Professional Affiliations and Accolades:
American Board of Criminalistics, American Academy of Forensic Sciences, Mid-Atlantic Association of Forensic Scientists, International Association of Bloodstain Pattern Analysts and the Forensic Science Society
1999 American Academy of Forensic Sciences Regional Award, 1999 International Association of Forensic Sciences Emerging Forensic Scientist Continental Award
Download executive interview from Drug Delivery Technology Magazine:
Gateway Analytical: Conventional & Novel Analytical Testing Services for Drug Development
Oksana Olkhovyk, Ph.D., Senior Scientist
Ph.D., Physical Chemistry; Kent State University, 2007
M.S., Chemical Engineering; Lviv Polytechnic University, 2000
B.S., Chemical Engineering and Industrial Ecology; Lviv Polytechnic University, 1999
Dr. Oksana Olkhovyk has broad materials characterization experience, applying her expertise in physical chemistry and materials science to advance the application and development of chemical imaging technology and instrumentation. In addition, Oksana has conducted research related to carbon materials and energy projects.
As a Senior Scientist at Gateway Analytical, Oksana develops analytical methods for materials analysis and other studies that support key commercial projects.
Oksana’s areas of expertise include: optical spectroscopy and microscopy; innovative applications of hyperspectral imaging, materials synthesis and characterization; surface chemistry; chemical modification of ordered mesoporous silica: post-synthesis and one-pot synthesis; surface functionalization/silanization; and synthesis of carbon nanostructures using various catalyst systems and reactor conditions.
Raman, NIR and fluorescence spectroscopy and imaging technology, and instrumentation; NMR, FTIR, XRD, SAXS, high-resolution thermogravimetry, and elemental analysis experimental experience; UV/VIS Spectrophotometric skills for analytical purposes; and gas sorption analysis and related computational expertise in characterization of porous materials
Spectroscopy Society of Pittsburgh
Cara Plese, Forensic Scientist
Bachelor of Science degree in Chemistry
Master of Science degree in Forensic Science.
Cara is from the Pittsburgh area, and earned her Bachelor of Science degree in chemistry from La Roche College in Pittsburgh in 2009. Cara earned her Master of Science degree in Forensic Science in 2011 from Virginia Commonwealth University in Richmond, Virginia. Cara’s specific concentrations for her Master’s Degree was trace evidence and physical evidence. Cara is a member of the American Academy of Forensic Sciences (AAFS), the Mid-Atlantic Association of Forensic Scientists (MAAFS), and the America Society of Trace Evidence Examiners (ASTEE).
Antonio Scatena, Laboratory Manager
B.S., Biochemistry; Indiana University of Pennsylvania, 2008
Antonio Scatena possesses more than two years of forensic and pharmaceutical laboratory experience working within a cGMP and ISO-based quality assurance environment. As Laboratory Manager at Gateway Analytical, Antonio manages the day-to-day technical operations in the lab, liaises with clients and serves as their scientific resource.
Antonio is well versed in the identification and characterization of foreign particulate using a variety of analytical instruments and routinely performs comparative analyses to determine the potential sources of contamination. Antonio’s experience also includes materials characterization by means of high -resolution microscopy.
Scanning electron microscopy, light microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, and gas chromatography/mass spectrometry.
The American Association for the Advancement of Science
The American Chemical Society
Rebekah Wagurak, Forensic Scientist
B.S., Biology, Duquesne University
M.S., Forensic Science and Law, Duquesne University
Rebekah Wagurak has several years of experience working under quality systems in both clinical and analytical laboratory settings, including cGMP and ISO environments. She has over two years of experience in materials characterization for both the forensic and pharmaceutical industries. Rebekah is well-versed in troubleshooting, customer interfacing, and method development.
Rebekah has experience in the areas of particulate analysis, root cause analysis, contamination identification, surface defect analysis, and particle morphology evaluation. She is also knowledgeable in clinical genetics and clean room procedure.
SEM-EDS, microscopy, FTIR, Raman, HIAC (USP), molecular/DNA analysis.
American Society of Trace Evidence Examiners (ASTEE)
Parenteral Drug Association (PDA)