Skip Navigation

Research Team - Current

Skip Side Navigation

Robert W. Nairn, Ph.D.

Bob holds both the David L. Boren Professorship and Sam K. Viersen Family Presidential Professorship in the School of Civil Engineering and Environmental Science at the University of Oklahoma (OU), Norman, Oklahoma, USA. He is the director of the Center for Restoration of Ecosystems and Watersheds (CREW), Associate Director of the Water Technologies for Emerging Regions (WaTER) Center and Adjunct Professor of Biology.  To learn more about his teaching, research and other interests, please visit his personal homepage.

Robert C. Knox, Ph.D.
Associate Director

Bob Knox is the Ted A. Kritikos Chair and Presidential Professor. His research interests are in subsurface transport and fate processes, ground water remediation technologies, ground water modeling, and the impacts of petroleum hydrocarbons, oilfield brines and mining effluents. CV


Post-Doctoral Researchers

CREW is currently searching for a post-doctoral researcher with expertise in watershed biogeochemistry.  Please contact if interested.

Research Staff

Bryan Page, MS

Bryan completed his undergraduate degree at Slippery Rock University in 2009. During that same year, he started working with BioMost, Inc. of Mars, PA. While at BioMost, Inc., Bryan worked with public and private clients on designing, operation, and maintenance of mine drainage passive treatment systems, along with other environmental services. In August 2014, he began his Master of Science in Environmental Science at the University of Oklahoma. His research focused on the hydraulic conductivity of vertical flow bioreactors. Bryan graduated from OU in December 2016.


Visiting Scholars

None at this time.

Graduate Students

Juan Arango Calderon
PhD student, Environmental Engineering

Juan has a Bachelor of Science in Environmental Engineering and Master of Science in Civil Engineering, Water Resources from The University of Oklahoma. His current research focuses on using remote sensing technology to develop models capable of determining water quality parameters.


Brandon Holzbauer-Schweitzer
PhD student, Environmental Science

Brandon received his undergraduate degree in Environmental Geoscience from Winona State University in 2014. He then moved to Oklahoma and began his graduate work, which focused on utilizing low impact development (LID) best management practices (BMPs) as alternatives to traditional urban stormwater management. He is now working on his doctoral research, which uses drones to evaluate habitat quality and predict surface water quality. In his free time, Brandon enjoys eating, watching sports, and, when the sun isn't shining, the wonderful Oklahoma weather.

Derrick Nguyen
MS student, Environmental Engineering

Derrick is from Oklahoma City, OK and earned his Bachelor of Science in Environmental Engineering at The University of Oklahoma. He is currently working on his Master's degree at OU. He is an avid Thunder basketball fan. Derrick also enjoys hiking and photography, a hobby he recently picked up.

Nicholas Shepherd
PhD student, Environmental Engineering

Nick was raised in Miami, OK near the Tar Creek Superfund Site, and he has been working on Tar Creek related research projects since his sophomore year of high school. His high school work led to working for CREW as an undergraduate research assistant, where he received a BS in Environmental Engineering and his MS in Civil Engineering, Water Resources . His masters research investigated the benefits of Castor canadensis (North American Beaver) when repopulating a mine drainage impacted stream.

Amy Sikora
MS student, Environmental Engineering

Amy was born and raised in Calgary, Alberta, Canada. She completed her Bachelor of Science in Environmental Engineering here at The University of Oklahoma. She is continuing at OU to get her Master's degree. Amy enjoys flower gardening and spending time outside in her spare time.

Zepei (Maggie) Tang
PhD student, Environmental Engineering

Maggie is from China and spent two years in Scotland. She moved to Pittsburgh to earn her Master's degree from Carnegie Mellon University. She is now at The University of Oklahoma working on her Doctoral degree. Maggie's current work consists of looking at the relationships between metals and nutrients at the sediment-water column interface in a large multi-use reservoir.

Tiffany Verlander
MS student, Environmental Science

Tiffany is from Tulsa, OK, and is a first year graduate student at OU. She obtained her undergrad from Northeastern State University in Biology with a Wildlife and Fisheries Emphasis. She also acquired a certificate in Geographic Information Systems from Tulsa Community College, and was most recently a GIS Research Assistant intern at NASA's Jet Propulsion Laboratory. In her spare time she enjoys travel, art, hiking, and has a passion for natural sciences.



Taylor Wall
MS student, Environmental Engineering

Taylor is from Tuttle, Oklahoma. She received her Bachelor of Science in Environmental Engineering from OU in May 2017. She is currently working on her Master’s thesis which will involve quantifying sulfide production, optimizing sulfide removal and quantifying renewable-energy driven aeration processes at the Southeast Commerce Passive Treatment System. 



Undergraduate Researchers

Dillon Bruer
BS student, Environmental Engineering

Diillon is from Raleigh, North Carolina and is a Junior working towards a degree in Environmental Engineering. He has plans to pursue a graduate degree either at OU or at a different University. He is currently working on a research project gathering information about Superfund sites across the US and finding comparisons between them and CREW's work at the Tar Creek Superfund site here in Oklahoma. Outside of school, he works with OU IT, plays on the club Ultimate Frisbee team, and watches the St. Louis Blues hockey team.



Chase Iddings
BS student, Environmental Engineering

Chase is from Dallas, Texas and is finishing his undergraduate degree in Environmental Engineering. He is working on a microbial bioassay comparing toxicity of untreated mine water and effluent from passive treatment systems. He currently interns at Cardinal Enviro Clean in Norman and in his free time likes to rock climb and camp. 

JD Ingendorf
BS student, Environmental Science

JD is from Dallas, Texas and is in his final semester as an undergraduate in Environmental Science. He is currently working on an undergraduate research project investigating the effectiveness of different organic substrates and their role in bacterial sulfate reduction. When he has spare time, he enjoys playing Ultimate Frisbee, fishing, playing basketball, and cooking for himself and his girlfriend.

Katherine Markley
BS student, Environmental Science

Katherine is from Tulsa, Oklahoma and is a junior pursuing a Bachelors of Science in Environmental Science. She is currently working on a data-mining project that focuses on tracking how benzene, toluene, ethyl-benzene, and xylene move in groundwater in real time. When she has free time, she enjoys baking, hiking, bicycling, and reading a good book.

Christine Robb
BS student, Chemical Engineering and Finance

Christine is a senior from Fort Worth, Texas, pursuing a double major in Chemical Engineering and Finance with a minor in Chemistry. She is currently researching metal-nutrient interactions at the sediment layer-water column interface within the Grand Lake o' the Cherokees watershed. She enjoys playing guitar, hammocking, and traveling.

Processed with VSCO with s3 preset

Harper Stanfield
BS student, Environmental Engineering

Harper is a third-year undergraduate from Atlanta, GA. He is pursuing a Bachelor and will pursue a Master of Science in environmental engineering, and plans to graduate with both in May 2020. He is a student employee with OU IT, and spends his free time travelling, cooking, and playing Ultimate Frisbee with JD.

Duncan Wright
BS student, Environmental Engineering

Duncan is from St. Johns, Michigan and is a junior pursuing a Bachelor of Science in Environmental Engineering. He is currently assisting Brandon Holzbauer-Schweitzer with the process of automating the merging of photographs taken by small unmanned aerial systems to create a analyzable image. He enjoys cooking and is an avid Detroit sports fan.