Our Team


Dustin Bambic, P.H.
Principal Hydrologist and Director

Dustin is an expert at stormwater planning, pollutant fate and transport and Clean Water Act compliance. His understanding of both the science and policy of Clean Water Act issues has enabled him to lead some of the most challenging water quality projects in the United States. Dustin has led numerous innovative stormwater implementation plans that leveraged state-of-the-art tools such as continuous simulation and genetic optimization to identify BMPs with maximum cost-benefit. He also has nationally recognized expertise related to the bacteria contamination that causes beach closures and freshwater impairments across the United States – he has led numerous cutting-edge special studies (including microbial source tracking and quantitative microbial risk assessment) to support implementation plans to reduce bacteria levels in stormwater and/or develop site-specific water quality criteria.  

Master of Science, Civil and Environmental Engineering, 2003, University of California-Davis

Master of Science, Hydrologic Science, 2003, University of California-Davis

Bachelor of Science, Physics, 2000, Western Kentucky University

Bachelor of Arts, Mathematics, 2000, Western Kentucky University


Stephen Carter, P.E.
Principal Engineer and Director

Stephen has supported numerous federal, state, and municipal clients in the areas of watershed modeling, emerging stormwater engineering practices, infrastructure planning, and Clean Water Act regulatory support. He has developed innovative approaches to watershed management, including leveraging advanced modeling systems to develop TMDLs and implementation plans to identify cost-effective BMPs and reduce stormwater and CSO impacts. Stephen has managed numerous large on-call engineering contracts, encompassing a wide spectrum of projects from water quality improvement planning to pollutant monitoring studies to city-wide infrastructure management. Stephen oversees Paradigm’s stormwater capture engineering efforts, including development of innovative concepts. Steve is a registered Professional Engineer with the state of California.

Master of Science, Environmental Engineering, 1999, University of North Carolina - Chapel Hill

Bachelor of Science, Civil Engineering, 1997, University of North Carolina- Charlotte


John Riverson
Principal Water Resources Analyst and Director

John is an internationally recognized expert in continuous simulation modeling and data analysis. His applications include hydrological modeling, climate change assessment, stormwater and watershed management, water quality modeling, and pollutant source characterization. John has led some of the largest watershed modeling projects conducted in the United States. John was a principal developer of the groundbreaking, public-domain modeling software – System for Urban Stormwater Treatment and Analysis Integration (SUSTAIN) for USEPA. John’s experience also includes computer programming of applications for storing, managing, and analyzing complex datasets to inform policy decisions. He also has a reputation as an effective communicator and has conducted numerous nationally attended workshops and training courses.

Master of Science, Civil and Environmental Engineering, 1999, University of Virginia

Bachelor of Science, Civil and Environmental Engineering, 1997, University of Virginia


John Craig
Principal Scientist and Director

John is an experienced environmental scientist and program manager who leads complex water resources projects. He has led signature projects involving water quality assessment, watershed planning and development of implementation-ready TMDLs. John has served as project manager for numerous large on-call federal contracts including major vehicles for USEPA. John served as contract manager for some of the most complex and innovative TMDLs in the U.S. including TMDLs for temperature, sediment, nutrients and bacteria.  He has provided support for water programs throughout the United States for federal, state, and local governments and brings a unique understanding of Clean Water Act programs across all levels of government.  John leads key internal operational aspects for Paradigm to promote efficiency and attainment of corporate goals.

Master of Science, Marine, Estuarine, and Environmental Sciences, 1992, University of Maryland

Bachelor of Science, Biology, 1986, Towson State University


Ryan Murphy
Senior Water Resources Analyst

Ryan has extensive experience applying an advanced knowledge of computer systems and programming to solve complex environmental and water resources challenges. His applications combine his inter-disciplinary background in urban & ecological planning, public policy, water resources engineering and computer science. Ryan has been involved in the development of numerous TMDLs, stormwater BMP implementation strategies, and green infrastructure planning efforts. He has diverse exposure to watershed and stormwater modeling systems gained through project-specific application, active software development, and leading hands-on training workshops. Ryan specializes in leveraging the power of high-end computing, large datasets and open source frameworks to develop integrated decision support systems. He champions the application of scientifically oriented, open source platforms such as Python, R and QGIS. Ryan supports project workflow within Paradigm to ensure efficient utilization of resources and leveraging of key expertise across multiple projects.

Master of Environmental & Water Resources Engineering, 2008-2010, Tufts University, Medford, MA

Bachelor of Science, Environmental Policy & Planning, 2005, Virginia Tech, Blacksburg, VA


Leila Talebi, Ph.D., P.E.
Senior Water Resources Engineer

Leila is a water resources engineer with extensive experience in the quantification of green infrastructure benefits at both site- and watershed-scales. She leads stormwater engineering projects that require interdisciplinary expertise across engineering design, modeling and pollutant fate and transport. Leila specializes in hydrologic and hydraulic analysis, water quality-based design of green infrastructure, and development of BMP monitoring programs. She has held key roles in several landmark projects in the U.S. which included planning, design, construction and evaluating the effectiveness of retrofitted green infrastructure BMPs across small- and large-scales. Leila was mentored by Dr. Robert Pitt, Emeritus professor at the University of Alabama and one of the ‘founding fathers’ in the field of stormwater quality engineering. Her engineering rigor and attention-to-detail ensure that our stormwater planning and modeling projects provide real-world outputs that are useful for capital improvement programs. Leila is a registered Professional Engineer with the state of California.

Ph.D., Civil and Environmental Engineering, 2014, University of Alabama

Master of Science, Civil and Environmental Engineering, 2012, University of Alabama

Master of Science, Civil and Environmental Engineering, 2007, Khajeh Nasir University of Technology

Bachelor of Science, Civil and Environmental Engineering, 2004, Amirkabir University of Technology


Khalid Alvi, P.E.
Senior Water Resources Engineer

Alvi is a water resources engineer with extensive experience in the development of linked watershed and stormwater BMP modeling systems. He leads teams of computer programmers and watershed modelers to produce applications and software for federal, state, and municipal agencies. Alvi has authored foundational software for stormwater and watershed modeling including the System for Urban Stormwater Treatment and Integration (SUSTAIN), Loading Simulation Program – C++ (LSPC), Stormwater Management Optimization Tool (Opti-Tool) and the BMP Accounting and Tracking Tool (BATT). He is also one of the leading experts in the application of EPA’s Spreadsheet Tool for Estimating Pollutant Loads (STEPL), and has provided national technical support to EPA 319 grantees and led hands-on-training courses across the country. Alvi’s leadership and innovative problem-solving are an asset across all phases of our modeling workflow, including problem formulation and simplification of computational complexities.  He is a registered Professional Engineer with the state of Virginia.  

Master of Science, Civil and Environmental Engineering, 1999, Asian Institute of Technology, Thailand

Bachelor of Science, Civil Engineering, 1993, University of Engineering and Technology Lahore, Pakistan


Ryan Edgley, EIT, HIT
Water Resources Engineer

Ryan is an engineer and scientist with experience in stormwater modeling and water quality compliance strategies. Ryan leverages broad knowledge of hydrologic and hydraulic models, geographic information systems, and numeric computing software (e.g., Python, R) in supporting strategic stormwater compliance strategies. His current areas of emphasis include hydrologic and hydraulic modeling, two-dimensional watershed modeling, geospatial analysis, data analysis, and watershed planning. Within Paradigm’s modeling workflow, Ryan supports BMP identification, vetting for feasibility, unit-BMP simulations, assessment of cost-effectiveness, and prioritization screenings. His analyses are integrated into a broader stormwater compliance framework supporting municipalities with demonstrating progress towards meeting water quality and flood reduction goals. Ryan brings a thoughtful, organized approach to Paradigm’s workflow by promoting rapid-turnaround, quality assurance, and cross-discipline collaboration.

Master of Science, Hydrology, 2016, Colorado School of Mines

Bachelor of Science, Geology, 2014, California State Polytechnic University, Pomona

Bachelor of Science, Science, Technology & Society, 2014, California State Polytechnic University, Pomona


Chris Carandang, EIT
Water Resources Engineer

Chris is an engineer with experience in stormwater planning and project design.  He has led concepts of numerous stormwater capture projects, including low impact development, green streets and regional facilities. Several of these concepts have been successfully funded by competitive grants. Chris leverages cutting-edge tools including continuous simulation models, geoprocessing and 3D design software. He is adept at identifying optimal locations for stormwater capture projects by using geoprocessing to identify available rights-of-way and public parcels with high potential to capture runoff. His research experience also includes analyzing satellite remote-sensing products to examine urban vegetation patterns in response to drought, local conservation measures, and urban water consumption. Chris brings a steady and consistent approach to engineering projects that promotes well-written, high-quality deliverables.

Master of Science, Civil and Environmental Engineering, 2015, Colorado School of Mines

Bachelor of Science, Civil Engineering, 2013, University of California, Los Angeles


David Rosa PH.D., CFM
Water Resources Scientist

David is a water resources scientist with expertise in watershed modeling and the installation, monitoring, and analyses of various urban and agricultural best management practices. David applies his skills in research, problem-solving, and stakeholder communication to support Paradigm’s watershed management projects. His experience includes calibrating and validating continuous simulation models for watersheds, implementing LID and traditional stormwater management techniques, and applying hydrologic and hydraulic models to quantify the water quality benefits of reconnected floodplains.  David has led modeling workshops for state officials and has expertise with a range of pollutants including phosphorus, nitrogen, chloride, suspended solids, and pathogens.  David is a certified floodplain manager and has worked closely with state and municipal partners to implement policies that promote flood resilience and the natural and beneficial functions of floodplains. 

Ph.D. Natural Resources, Land, Water, and Air, University of Connecticut, 2017

Master of Science, Natural Resources, Land, Water, and Air, University of Connecticut, 2013

Bachelor of Science, Natural Resources, University of Vermont, 2006


Eric Wineteer
water resources engineer

Eric is a water resources engineer with a background in numeric models and data science.  He has experience in hydraulic and hydrologic modeling in a wide variety of applications, ranging from small scale green infrastructure feasibility studies to larger regional studies. Eric employs advanced data science techniques which improve the development of Paradigm’s hydrologic and water quality models. He contributes to climate change analyses using spatiotemporal climate data, conducted high-resolution watershed characterizations, and created advanced data processing algorithms. During this graduate research, Eric assessed the interplay between future climate scenarios and the magnitude of evapotranspiration on the water balance.

B.S. Civil Engineering - Northeastern University, Boston, MA - 2018

M.S. Civil Engineering - Northeastern University, Boston, MA - 2019 (Expected)


Jack Mikesell, EIT
Water Resources Engineer

Jack is a water resources engineer who brings an emerging background in watershed hydrology. Jack has gained experience supporting stormwater and watershed management initiatives in California through the compilation, analysis, and synthesis of climate, geospatial, and environmental monitoring datasets. He has supported regional planning efforts ranging from stormwater master planning and watershed modeling to capital planning, conceptual design, and the application of GIS. Jack’s graduate research includes analyzing field-based LiDAR data and remote sensing products to develop computational tools for the assessment of post-wildfire hydrogeomorphic risks. He also leverages hydrologic models to inform watershed sustainability and landscape-scale planning efforts.

Bachelor of Science, Environmental Engineering, 2018, San Diego State University, Minor in Sustainability

Master of Science, Civil Engineering, 2020 (expected), San Diego State University


Xiaomin Zhao, Ph.D.
Water Resources Engineer

Xiaomin is a water resources engineer with experience in watershed-scale hydrological modeling and data analysis. Her expertise includes developing multivariate regression models, investigate the fate and transport of water quality parameters within receiving waters and data analysis to support of water quality model development. Xiaomin also has supported the development of TMDL models for nutrient, including the processing of spatial data for model setup and calibration of both hydrology and water quality. She applies her knowledge of computer systems and GIS to support complex hydrology and surface water quality studies. As part of the Paradigm team, Xiaomin has developed several data analysis and plotting tools to improve the efficiency of hydrological and water quality calibration and the production of reports.

Ph.D., Civil Engineering, 2018, University of Virginia

Master of Science, Civil Engineering, 2013, Virginia Tech

Bachelor of Science, Environmental Engineering, 2007, Taiyuan University of Technology

Lauren steinberg
Water Resources Engineer

Lauren is a Water Resources Engineer who brings to Paradigm an expertise in water treatment and environmental systems design. Lauren has extensive applied research experience surrounding the design and implementation of decentralized wastewater treatment systems to improve water quality and sanitation in developing countries. Her current thesis work incorporates treatment design and data synthesis to perform non-targeted identification of chemicals of emerging concern in membrane treated wastewater. Lauren has gained experience supporting stormwater planning initiatives through the analysis, synthesis, and visualization of water quality and geospatial datasets.

Master of Science, Civil Engineering, 2020 (expected), San Diego State University

Bachelor of Science, Environmental Engineering, 2018, San Diego State University

Robert Berger, GISP
Senior Applications Developer

Robert is an experienced applications developer and project manager, with expertise in an array of software platforms and coding languages. Robert’s diverse skill sets cover GIS analysis, imagery, full-stack programming, geodatabases, and mapping.  He has led development teams to create numerous complex web-systems, ranging from stormwater tracking to modeling interfaces to groundwater data management systems.  Robert has developed a variety of products for the desktop and web, bringing GIS and other automation solutions for data management, visualization and reporting. Robert is highly experienced with technologies in the Microsoft (.NET) stack, while also being proficient with other/open-source platforms.  He is proficient in numerous languages (C#.NET, SQL, JavaScript, C++, Android Java, VB.NET, Python), frameworks (Microsoft.NET, jQuery, ESRI ArcObjects, D3.js, Type Script, React), databases (Microsoft SQL Server, PostgreSQL, MySQL, SQLite) and hosting environments (cloud-hosted, client-hosted).   He has a strong GIS and database management background, pays attention to detail and is familiar with QA/QC and project management processes.  Robert’s emphasis on user experience, testing and reliability leads to products that consistently deliver exceptional client and end-user experience and satisfaction.

Master of Science, Geography, 2007, Ball State University  

Bachelor of Science, Computer Information Science, 2005, Minnesota State University

Bachelor of Science, Geography, 2005, Minnesota State University

Garrett Ward
Applications Developer

Garrett is an applications developer with a background in environmental studies. Garrett has supported application development efforts from stormwater tracking systems to tide prediction tools. He is proficient in numerous languages and  development frameworks including C#, .NET, JavaScript, AngularJS, Typescript, Python, and Django. Garrett’s background in environmental studies provides important context and insight for Paradigm’s development team, which leads to efficient workflows and improved user experience.  

Bachelor of Arts, Environmental Studies, 2012, University of North Carolina - Wilmington

Full Stack Software Development Certification, Nashville Software School, 2018 - Nashville, Tn

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Kayla Reid
Applications Developer

Kayla is a full stack applications developer with experience in an array of software platforms and coding languages. She has supported Paradigm’s development of web-systems, including stormwater tracking and BMP effectiveness assessment applications.  Kayla is highly experienced with technologies in the Microsoft (.NET) stack, and rapidly gaining proficiency with open-source platforms.  She is proficient in numerous languages and development frameworks including C#, .NET, JavaScript, React, jQuery, Visual Studio, and Dapper.  She is enthralled with the complexities of coding and driven to create ways for clients to interact with technology, and enjoys the challenge of organizing and communicating datasets.  Kayla’s aesthetic/design sense and enthusiasm for emerging frameworks supports Paradigm’s development team with creating applications that are elegant and cutting-edge while still founded on robust design practices.

Full Stack Software Development Certification, Nashville Software School, 2018

Kirren Covey
Applications Developer

Kirren is a full stack applications developer with a background in biology. She has experience with many platforms, languages and tools including JavaScript, React, C#, .NET, SQL, and Visual Studio. Kirren is leveraging her science background with programming expertise to advance Paradigm’s web applications, including advancement of linkages between open source continuous simulation modeling software and web-based platforms.

Bachelor of Science, Biology, 2010, Central Washington University

Full Stack Software Development Certification, Nashville Software School, 2019

Cory Bambic
Graphic Designer

Cory brings a background in photojournalism and photo editing to support Paradigm’s graphic design needs.  She leads creative elements of Paradigm’s corporate branding including graphical elements of deliverables and websites.  

Bachelor of Arts, Photojournalism, 2000, Western Kentucky University

Bachelor of Arts, Anthropology, 2000, Western Kentucky University

Melissa Craig

Melissa brings a background in financial management counseling and international trade development to support Paradigm's internal operations. She manages accounts receivable, accounts payable and internal accounting.

Master of Arts, 2000, International Affairs, George Washington University

Bachelor of Arts, 1997, International Studies and Philosophy, Muhlenberg College