CivilTech Engineering

Our Team

Corporate Leadership

  • Melvin G. Spinks, PE, CFM

    Melvin G. Spinks, PE, CFM


    Mr. Spinks has 30 years of professional experience in the management and engineering of water resources engineering and civil engineering projects. Mr. Spinks is recognized nationally as a technical expert in hydrologic and hydraulic modeling and risk analysis for complex urban flood control systems. He has managed multi-million dollar federal projects with the U.S. Army Corps of Engineers (USACE) and Federal Emergency Management Agency (FEMA); riverine and coastal studies with the Texas Water Development Board and Texas General Land Office, and over 100 highway and bridge drainage projects with the Texas Department of Transportation; as well as numerous drainage and flood reduction projects for area cities and counties.

    Mr. Spinks has served as a technical expert on litigation cases for water resources engineering issues. He has testified in civil and federal courts as a technical expert including most recently on Hurricane Katrina Flooding in the Lower Ninth Ward in New Orleans, Louisiana. His work has primarily involved technical expertise in hydrologic and hydraulic modeling for complex drainage and flood protection systems.

  • Darrell L. Kaderka, PE

    Darrell L. Kaderka, PE

    Vice President

    Mr. Kaderka has nearly 30 years of structural and transportation engineering expertise, which includes work for the Texas Department of Transportation, Harris County Flood Control, Houston METRO, Harris County Tollroad Authority, the Grand Parkway Association, various city and county agencies and private developers. He has worked as lead project engineer and project manager for projects that include highway design, minor and major bridge design, roadway design, utility relocation, traffic signals and control, port container yard design, and residential development. Specialized structural engineering design includes multi-story post-tensioned parking garages, multi-story steel framed buildings, single-story masonry buildings, bridges, retaining walls, and flood control structures. 

  • Erin G. Ward, CPA

    Erin G. Ward, CPA


    Ms. Ward has 25 years of experience providing accounting function services for companies ranging in function from civil engineering to oil and gas, software development, and restaurant management. She is adept at preparing financial statements, account reconciliations and variance explanations, budgeting and employee benefit management.

Division Leadership

  • Amir Mosaffa

    Amir Mosaffa

    Construction Services Department Manager

    Mr. Mosaffa leads our construction services division, inclusive of construction managers, inspectors, and supervisors. He has nearly 30 years experience on the majority of Houston's major thoroughfares.  Prior to joining CivilTech, Amir worked as a construction project supervisor for TxDOT. In this capacity, he was responsible for construction of many significant TxDOT projects. Most recently, Mr. Mosaffa served as a project supervisor for the $900 million dollar construction of the US 290 Corridor. Amir’s work on the US 290 Corridor construction saved TxDOT and taxpayers an estimated combination of $66 million and allowed the job to complete an estimated one year earlier than anticipated.

  • Paul Baxter, PE

    Paul Baxter, PE

    Lead Transportation Engineer

    Mr. Baxter has 15 years experience in general civil engineering design including transportation design, municipal design, structural design, hydrology, and hydraulics. His responsibilities include designing and preparing PS&E for highways, bridges, and roadways for clients such as Harris County, the City of Dallas, the City of Frisco, NET-RMA, and TxDOT. Other responsibilities include internal and external project coordination, project scheduling and management, construction estimating and bid preparation, quality control and quality assurance, staff management and development, and business development.

  • Connor McColloch, PE

    Connor McColloch, PE


    Mr. McColloch is well regarded for his expertise in hydrology and hydraulics. Experience includes hydrologic and hydraulic studies, roadway and subdivision drainage projects, storm water modeling projects and drainage impact analysis. Programs that he has led include the City of Houston pre-engineering stormwater program, various long-term drainage remediation planning and design projects, and drainage engineering design on the Grand Parkway Sections F and G.

  • Julian Garza, PE, CFM

    Julian Garza, PE, CFM

    Land Development

    Mr.Garza has more than 23 years of experience in the planning, design, supervision, construction management and prjoect management of private and public projects. In his career, he has overseen numerous land development projects in Harris and Brazoria Counties as well as extensive experience in the design of storm water systems, wastewater collection systems, relief sewers, sanitary sewer point repair, wastewater lift stations and force mains.