RILEY ENGINEERING - Key Persons
Education:
• AAS in Accounting, Pima Community College, 2021 (Bookkeeping Emphasis)
Background:
Mrs. Cosentino's background is in administration and bookkeeping. She has employed these skills throughout her career at several local businesses including, medical, accounting and retail as well as non-profit leadership. She is happy to call Tucson her home for close to 30 years.
Education:
AAS in Architecture, Otero Junior College, 1972
Background:
Mr. Edmunds has a wealth of professional design and drafting experience for civil engineering projects ranging from land development and public works to mining. He has worked on many projects throughout the southwestern United States. He is proficient in designing with AutoCAD Civil 3D. His experience includes preparation of: plats; grading and drainage plans; levee/berm design; channel design; paving plans; sewer and storm-drain plans; water plans; survey right-of-way plans; legal descriptions; roadway plans; waste-rock grading plans; heap-leach-pad grading plans, and reclamation contouring design drawings.
Job Titles:
- Water & Wastewater Engineer
Education:
• Doctor of Philosophy in Environmental Engineering, University of Arizona, 2018
• Master of Science in Environmental Engineering, University of Arizona, 2012
• Bachelor of Science in Engineering, Colorado School of Mines, 2006
• Bachelor of Science in Mathematics and Computer Science, Colorado School of Mines, 2006
In his 49 years of professional experience, Mr. Zeller has served as Project Principal and/or Project Manager for well over one-thousand projects relating to hydrologic, hydraulic, and erosion and sedimentation problems within areas in and around Tucson, Pima County, and southern Arizona. Principal projects have included a river mechanics study for the Santa Cruz River in Tucson, project management of the Flood Control/Floodplain Management element of the Rillito Corridor Study, one of four principal elements of a $1.7 million dollar master plan study for a 110-square mile area in northern Tucson, development of a detention/retention design manual for use by both Pima County and the City of Tucson; development of a Floodplain and Drainage Standards Manual for the City of Tucson; development of scour procedures for pipeline crossings of watercourses for the Pima County Regional Wastewater and Reclamation Department; preparation of several river-management plans for major watercourses in Pima County and the City of Tucson; development of basin-management plans for the City of Tucson and Pima County; and the preparation of a master surface water plan for the City of Sierra Vista. Mr. Zeller also authored the Pima County Hydrology Manual (currently referred to as "PC-HYDRO") while employed as the Floodplain Manager of the Pima County Regional Flood Control District.
Mr. Chris Horstman worked as a design/build architect focused on energy efficient and low-income housing until returning to the University of Arizona Civil & Architectural Engineering Department where he worked as a graduate student and research engineer. It was during this time that he joined Riley Engineering, having a shared commitment for developing water resources in rural and underserved communities. Chris leverages his knowledge of ground/surface water hydrology, hydraulic infrastructure design, and site civil design to provide creative solutions to large scale water resources projects. His construction experience has led Chris to become an asset at Riley for performing complex site grading and drafting comprehensive drainage plans. His expertise lies in employing his computer programming and modeling skills to provide creative solutions to large scale water resources projects.
Originally from Flagstaff, AZ, Mr. Horstman's commitment to education and his community led him to help establish a K-12 water engineering competition. He remains active in this outreach program at Riley Engineering, helping students across Arizona understand their water supply through a hands-on engineering activity. Mr. Horstman's graduate work has focused on surface and groundwater interactions along the San Pedro River in southeastern Arizona and northern Sonora, Mexico. In his role, Chris maintains a focus on quality client/stakeholder interactions, developed through his experience collaborating with regulatory government agencies, NGOs, and a diverse array of clients.
Job Titles:
- Business Manager
- Business Manager at Riley
Education:
Bachelor of Arts in Business Administration, Vanguard University of Southern California, 2014
Background:
Mrs. Selah Tsosie is the Business Manager at Riley, with a decade of combined experience in business administration, communications, public relations, marketing, training, events, and project management. She grew up in southwest Tucson, AZ, followed by living in southern California for 8 years. Family brought her back to Tucson, and she is thrilled to make a difference in the world as part of the Riley Engineering team.
Selah's husband is Navajo, from Black Mesa, AZ, on the Navajo Nation. She likes to say she's "Navajo by marriage" and share the ways she's fallen in love with the beauty of the Navajo culture as well as seen the barriers that many Diné encounter when trying to acquire essentials like running water and related civil engineering needs. Joining Riley Engineering was a dream come true for Selah, as she loves using her business experience to support our engineers while they support our clients.
Job Titles:
- Principal
- Founder and Principal of Riley
Education:
• Doctor of Philosophy in Civil Engineering, University of Arizona, 2017 (Water Resources Emphasis)
• Master of Science in Civil Engineering, University of Arizona, 2011 (Water Resources Emphasis)
• Bachelor of Science in Civil Engineering, University of Arizona, 2008
Dr. Chee is the Founder and Principal of Riley. His experience as a water resource engineer is expansive and ranges from being a designer, to a project engineer/manager, as well as managing the company. He has experience in hydrology & hydraulics, water distribution systems, grading and drainage. As the Principal of Riley, he is responsible for managing day-to-day operations of the company and ensuring projects are technically sound and completed on time and on budget.
Mrs. Kelly has served communities throughout the United States, including extensive work on and near the Navajo Nation, in a variety of capacities. Most recently, as the Executive Director for the Navajo Election Administration, she supervised the Navajo Election Administration team members, conducted the 2022 primary and general elections, and partnered with the Navajo Nation Council, Legal Counsel, and Election Board.