KRISTI SIMPSON, PE, LEED AP

Kristi Simpson, PE, LEED AP, President and Senior Project Engineer, is responsible for the more advanced geotechnical engineering projects, in situ testing, soil mechanics laboratory testing and equipment maintenance.  She is a registered professional engineer in Oklahoma, Texas, Kansas, Colorado and Missouri.  Kristi holds a Bachelors of Science in Civil and Environmental Engineering and a Masters of Science in Civil (Geotechnical) Engineering from Oklahoma State University.

Mrs. Simpson has extensive experience in global stability analysis of slopes and retaining walls, embankment settlement, site characterization, project management and pavement evaluation.  Areas of technical focus include stability analysis of embankments, dams, slopes and walls as well as the evaluation and mitigation of problematic soils and soil settlement.  In addition to complex engineering analyses, Kristi maintains and operates the in situ field testing equipment (DMT and PMT) and maintains the equipment for and performs soil mechanics laboratory testing (direct shear, triaxial shear and consolidation).

HONORS & AWARDS

• 2020-2021 Outstanding Oklahoma Geotechnical Engineer, ASCE Geo-Institute, Oklahoma Chapter

PROFESSIONAL ACTIVITIES

• ASCE Geo-Institute – Embankments, Dams and Slopes Committee, Codes & Standards Council
• ASCE Geo-Institute Oklahoma Chapter – Past President and Co-Founder
• ASCE Oklahoma City Chapter – Past President, Vice President, Secretary and Younger Member Chair
• ACEC Oklahoma

PUBLICATIONS

• Gregory, GH, and KK Bumpas (2013). “Post-Peak Fully-Softened and Curved Strength Envelope in Shallow Slope Failure Analysis.” Published in Geotechnical Special Publication No. 231 – ASCE Geo-Institute.
• VandenBerge, DR, AJ Esser, KK Bumpas (2014). “An Overview of Sustainability Applied to Earth Structures.” IFCEE 2015: International Foundations Congress and Equipment Expo Proceedings.
• Bumpas, KK, CH Grinsteiner, J Koscelny (2018). “Lessons Learned: Oklahoma State Highway 99 over the Washita River.” IFCEE 2018: International Foundations Congress and Equipment Expo Proceedings.

JEREMY BASLER, PE

Jeremy Basler, PE, Geotechnical Manager, is responsible for business development and the management of the geotechnical engineering operations.  He is a registered professional engineer in Oklahoma and Texas.  Jeremy attended college at Oklahoma State University, where he received a Bachelors of Science in Civil Engineering and a Masters of Science in Civil Engineering.

Mr. Basler has extensive experience in soils testing and evaluation, foundation and pavement consulting.  Areas of focus include earthwork, foundation and pavement recommendations, expansive soils, pressuremeter testing, cone penetrometer testing, slope stability, settlement of compressible soils, geotechnical forensics and dam inspections.

Jeremy has been involved in geotechnical investigations for bridges, roadways, wind farms, solar farms, commercial buildings, retaining walls, utility relocations, industrial and chemical plants, pipelines, storage tanks, communication towers, lagoons and water treatment plants.

PROFESSIONAL ACTIVITIES

• ASCE Geo-Institute Oklahoma Chapter
• ASCE Oklahoma City Chapter – Past President, Vice President, Secretary and Treasurer
• ACEC Oklahoma

EMMA COGGIN-LOW, EI

Emma Coggin-Low, EI, Project Specialist, is responsible for geotechnical engineering projects and soil mechanics laboratory testing.  She manages geotechnical projects from beginning to end by coordinating with subconsultants and landowners, performing field work, organizing and analyzing field and laboratory data and presenting all the results for engineering reports. Emma has extensive experience in project management, pavement design, DMT testing and laboratory testing. 

Mrs.  Coggin-Low graduated with a Bachelors of Science in Civil Engineering and a Masters of Science in Civil Engineering with a Geotechnical Emphasis from Oklahoma University.  As an undergraduate at OU, Emma earned several scholarships and worked as a research assistant helping with research focused on compressed earth block construction and geofabrics.   While earning her Masters Degree, she worked as a graduate teaching assistant for the soil mechanics lab.

In addition to data reduction and engineering analyses, Emma operates the DMT in situ field testing equipment and performs soil mechanics laboratory testing (direct shear, triaxial shear and consolidation).

SYDNEY CANNON

Sydney Cannon, Project Specialist, became a part of the Red Rock team in June 2025 and is off to a great start! Sydney is responsible for coordinating and overseeing field work as well as assisting with geotechnical reports by organizing and presenting diagrams and data from the field and laboratory.

Miss Canon holds a Bachelor of Science in Biosystems & Agricultural Engineering with a minor in Agricultural Economics/Agribusiness from Oklahoma State University. In addition to her undergrad work, she also earned a certificate in Equine Enterprise Management. Sydney most recently graduated with a Master of Science in Biosystems & Agricultural Engineering from the University of Kentucky. While in Kentucky, she worked as a research assistant for the University of Kentucky and for the Racing Surfaces Testing Lab, where she learned to perform soil mechanics laboratory testing (triaxial shear, among others) on soil from horse racing tracks all over the country.

Sydney brings a diverse background in education, research, customer service and public representation. She was Miss Rodeo Tennessee 2024, where she served as a representative for professional rodeo and the agriculture industry nationwide.

VALERIE MARTINEZ

Valerie Martinez, Office Administrator/Team Mom, keeps things running around Red Rock.  She began at Red Rock with over 10 years’ experience in office management and administrative support of all kinds.

Mrs. Martinez mans the phones while assisting with the administration of proposals, reports and marketing materials.  She enjoys interacting with people, which leads her to helping with projects in many different ways. Valerie keeps up with our accounting and is in charge of Red Rock celebrations, teambuilding events and maintaining our certified Excellent Healthy Oklahoma Business program.

RED ROCK CONSULTING SOILS LABORATORY

Chad Pierson, Laboratory Manager, keeps the Red Rock soils lab trucking along in addition to performing soils testing.  Mr. Pierson is an ODOT certified soils technician and Red Rock’s longest employee with more than 10 years of dedication.  He has been recognized not once, but twice, as a stellar Red Rock employee and lab testing extraordinaire. Chad is also our resident animal enthusiast and caretaker.

Cole Sakowsky, lab technician, is Red Rock’s newest employee, beginning in September 2025. He comes from Port Crane, New York, and holds a Bachelor of Science in Biological Sciences from the University at Buffalo.

Chris Sidwell, lab and field technician, spends time testing soil in the lab and coring pavement in the field. Chris graduated from Oklahoma State University with a Bachelor of Science in Plant and Soil Sciences with an emphasis in agribusiness and crop production.