Our Phoenix office is now located at 5050 N. 40th St., Ste. 100, Phoenix, AZ 85018. Phoenix (602) 252.8384 | Prescott (928) 445.5595

“Professionals creating successful environments through innovation, technology, and teamwork”

Our goal is to provide you with excellent client service, exceed your project’s needs, and to add value through creative engineering solutions. Our “hands-on” project management approach allows for early identification and resolution of a project’s specific issues with an emphasis on service and follow-through to project completion. We combine the latest technologies with our expert team members to deliver creative engineering solutions that go beyond your expectations, consistently ON-TIME, ON-BUDGET, ON-POINT.

  • HR-Principles
  • Relationships
  • Integrity
  • Technology
  • Experience

Paul H
Paul W.R. Hoskin, PE
Principal/Water Resources Director
Paul has more than 32 years of experience in the field of hydrology, hydraulics, drainage master planning and floodplain management. He has worked on several master drainage plans, storm drainage system design and floodplain delineation studies for multiple private and public clients throughout Arizona. His graduate research study was in the use of sediment transport techniques including the use of HEC-6. He also has experience in the use of TR-20, TR-55, HEC-1, HEC-2 and HEC-RAS. He has acted as Project Engineer and Project Manager with responsibilities for technical analysis, report writing and project control.
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  • BS, Civil Engineering
    University of Salford
    Salford, England
  • MS, Civil Engineering
    Arizona State University
    Tempe, Arizona


Tom R
Thomas B. Ryan
Tom has more than 30 years of experience local to the Valley which is comprehensive and extensive in the field of land development. His project experience includes numerous large master planned communities, residential developments ranging from low density to high density, commercial, and industrial projects. Tom’s approach to project management is grounded in the responsibility and accountability of all the aspects of the project, including: the initial survey work, planning, preliminary plat/preliminary site planning, engineering (sewer, water, grading, paving, drainage, final plat), and the preparation of the construction documents. Mr. Ryan compliments his technical experience with the fundamental goal of establishing working relationships with the reviewing agency by engaging them early on in the project and including them as a valuable member of the team.
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  • BS, Mining Reclamation University of Wisconsin
    Platteville, Wisconsin


Ryan R
Ryan H. Raab, PE
Vice President
Ryan’s experience is in civil engineering design and project management for both the public and private sectors. He is knowledgeable in the design, planning and construction management of a wide range of public improvement projects. Ryan brings a client’s visions to a designed and constructed reality. He has extensive project management experience in the planning and design of infrastructure improvements including roadways, water distribution lines, sewer collections mains and storm drain collection systems. Ryan has played a major role in the quality control and constructability review for numerous engineering projects. His work displays sound engineering principles and practical implementation of design. His focus is on timely delivery of all project tasks. Ryan is responsible for coordination with the client and other affected agencies, subconsultants, utilities and also with the public. He has been responsible for the planning, coordination and presentation to the public on several large projects.
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  • BS, Civil Engineering
    Ohio State University
    Columbus, Ohio


Doug B
J. Doug Both, CFM
Senior Project Manager
Doug’s experience in civil engineering and storm water includes both public and private development projects. He is specialized in hydrologic studies, hydraulic analysis and design of flood control facilities, including storm drain and channel systems. He has prepared master drainage studies and design studies for single family, multi-family, and commercial developments, and has extensive experience in the application of the HEC-1, HEC-2 and HEC-RAS computer software. Doug has performed floodplain delineation studies for urban and natural desert watercourses.He has prepared an extensive amount of map revision requests to FEMA, including both Conditional and Final Letters of Map Revisions (CLOMRs/LOMRs). He has extensive experience in watershed modeling utilizing HEC-1. This experience includes evaluations of drainage concepts for land development and public works projects. His design experience includes storm sewer systems, culverts, channels, bank and slope stabilization, and retention and detention basins.
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  • BA, Industry
    University of Northern Iowa
    Cedar Falls, Iowa


Thomas Granillo
Thomas Granillo, PE, CFM, RLS
Senior Project Manager
Tom has over 28 years of professional experience in civil engineering and land surveying. His background includes roadway design, hydrologic modeling, storm drain design, the design of large diameter water mains, trunk main sewers, and non-potable water mains for numerous public and private clients. He also has experience in underground utility coordination and design, urban infrastructure requirements, and design of roadway environments.

  • BS, Civil Engineering
    Arizona State University
    Tempe, Arizona


Scott Lorentzen, PE
Senior Project Manager
Scott has over 20 years of experience in civil engineering, construction and land development in the Phoenix area. He has managed and designed the construction of civil facilities including, roadways, utilities, pump stations, drainage and grading. Scott started his career working in the field as a survey crew member and continued to work his way up at small and large firms before starting his own civil engineering company, Southwest Land Consulting in 2005. Scott brings with him a wealth of experience and depth to his new position and will focus on the expansion of Hoskin Ryan’s land development portfolio.

  • BS, Civil Engineering
    Arizona State University
    Tempe, Arizona



Matt Pruitt
Matt Pruitt, PE, CFM
Project Manager
Matt has over 10 years of civil engineering experience in both the public and private sector. He is specialized in hydrologic and hydraulic analysis and in the design of flood control facilities. He is also skilled in open channel flow modeling, water distribution modeling, watershed analysis, two-dimensional hydrologic and hydraulic analysis and GIS. Matt has prepared master drainage studies and drainage design studies for residential and commercial developments as well as master water studies and sewer studies. He has prepared floodplain delineation studies, and map revisions request to FEMA, including both Conditional and Final Letters of Map Revisions (CLOMRs/LOMRs). He has also prepared several 404 Preliminary Jurisdictional Delineations and 404 Permit applications to the U.S. Army Corps of Engineers.

  • ME, Civil Engineering
    Utah State University
    Logan, Utah
Steve Zabala
Steve Zabala
Project Manager
Steve has been in the land development industry for over 30 years. Steve is skilled in both the civil engineering and the builder/developer for the development of land of residential or commercial projects. While bringing a great extent of site development knowledge to the team, he also contributes forward planning, full entitlement, day-to-day construction management experience, and excellent communication skills.
Ken Converse
Ken Converse, RLS
Survey Manager
Ken is a Licensed Surveyor in Arizona, with 21 years of experience as a Registered Professional Surveyor. His expertise encompasses aerial mapping, topographic surveys, boundary surveys, cadastral surveys, right-of-way determination, drainage delineation studies, master planned communities, residential and commercial property surveys, surveys for towns and municipalities, recreational facilities, major roadways, streetscapes, and utility surveys. Ken possesses a strong knowledge of surveying methods and requirements, and a complete understanding of deliverables, both tangible and intangible, to successfully satisfy municipalities, government agencies, and private industries.


Jody S
Jody Stone, RLS
Survey Manager – Prescott
Jody is a Licensed Surveyor in Arizona, with over 35 years of experience in the surveying sector. He has extensive management experience with small projects as well as large complex projects involving boundary survey and mapping. His expertise encompasses review of title reports, boundary analysis, preparation of ALTA/ACSM surveys, legal descriptions, Geodetic Control for large aerial mapping projects, Topographic Surveys, Boundary Surveys, Cadastral Surveys, golf courses, utility location, and Right-of-Way Determination. Jody specializes in Mining Projects, is MSHA/HAZWOPER/CPR Certified and has an established relationship with some of the largest copper mines in Arizona. He possesses overall industry knowledge in support of residential and commercial projects, as well as public works projects for the design and replacement of public utilities and improvements for Towns and Municipalities.


John M
John Mireles
CADD Manager
As the “go-to guy,” John loves to meet the challenges of tight schedules and managing a variety of interconnected tasks. He does whatever it takes to provide dependable, reliable, quality service and work products. John is good at planning projects from the deadline backwards, but he also jumps right into something when necessary. With experience in land development, ranging from the planning of large master-planned communities to the design of small individual lot grading, John worked on the design, coordination, and production aspects of numerous residential, commercial, and surveying projects. Educated as an Architect, he also brings strong design skills to all of his projects and to his CADD Manager duties within the office. John leads by example, overseeing the CADD Team and the submittals to various municipalities, counties, and government agencies in Arizona.
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  • Architecture Studies
    Arizona State University
    Tempe, Arizona