Led by David Wavrek, Ph.D., the PSI team is comprised of highly capable staff geologists, all of whom bring a unique skill set to client projects.


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David Wavrek, Ph.D, President

Dave has more than twenty-five years of experience in providing timely and innovative solutions to technical problems by integrating geochemistry, geology and engineering disciplines for conventional and unconventional targets. He demonstrates a commitment to teamwork through successful completion of interdisciplinary projects in 50+ countries and 200+ petroleum basins. Dave's personal skill set includes attention to detail, multi-dimensional (time and space) visualization and rapid concept/data assimilation. Outside of the office Dave is an avid 'snow sports' and race car enthusiast, depending on the season. The 2016 schedule includes the quest to qualify for the 200 mph club on the Bonneville Salt Flats. 

Click here to view Dave's CV.


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Ashley Hansen, M.S., Senior Geologist

Ashley received her B.S. and M.S. in Geology from Brigham Young University. After graduating with her master's degree, Ashley served as an adjunct geology instructor at the College of Idaho before joining PSI a year later. Ashley's master's thesis involved studying the Navajo Sandstone. Outside of the office, Ashley stays busy playing with her twins (a boy and a girl) and toddler (girl), and spending time with her husband. She is currently on family leave from PSI. 

Click here to view Ashley's CV.


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Maria Slack, M.S., Senior Geologist

A graduate of Brigham Young University, Maria received her B.S. and M.S. in Geology. While in grad school, Maria was named Teaching Assistant of the Year by the BYU Geology Department. Her master's thesis included travel to the Himalayas and study of glacier melt in the Indus River watershed. She joined PSI soon afterward and has since gained petroleum systems experience in North and South America, the former Soviet Union, Northern Africa, the Mediterranean, the Middle East and parts of Asia. When not at work, Maria enjoys staying active in sports and spending time with family and friends.

Click here to view Maria's CV.


Jessica Williams, M.S.,Geologist

Jessica received a B.S. and M.S. in Geology, both from Brigham Young University. While pursuing her master's degree, she received a highly coveted NASA Antarctica Research Fellowship - twice. As part of the fellowship, Jessica spent two months in Antarctica collecting ice cores. Upon graduating from her master's program in 2013, Jessica joined PSI, where she has had the opportunity to collaborate on numerous global projects. Jessica enjoys playing sports. Whether it's hiking, cycling, or playing volleyball, Jessica loves to get                                                                             outdoors! 

                                                                      Click here to view Jessica's CV.