TEAM
Michelle Maddaus

Michelle Maddaus

President, Senior Engineer

Service/Discipline: Water Resource Planning and Management
Years Experience: 20
Education/Degree: MBA, BS Engineering
License: PE

Lisa Maddaus

Lisa Maddaus

CFO, Senior Engineer

Service/Discipline: Water Resource Planning and Management
Years Experience: 24
Education/Degree: MS Engineering
License: PE

Chris Matyas

Chris Matyas

Software Engineer

Service/Discipline: Software for Water Efficiency
Years Experience: 20
Education/Degree: BS Engineering

Tess Kretschmann

Tess Kretschmann

Staff Engineer

Service/Discipline: Water Resource Planning and Management
Years Experience: 15
Education/Degree: BS Engineering

Andrea Pacheco

Andrea Pacheco

Technical Editor

Service/Discipline: Technical Documentation, Executive Administrator
Years Experience: 17
Education/Degree: BA English

William Maddaus

William Maddaus

Principal, Technical Advisor

Service/Discipline: Water Resource Planning and Management
Years Experience: 57
Education/Degree: MS Engineering
License: PE

Hannah Braun

Hannah Braun

Water Resource Analyst

Service/Discipline: Water Resource Planning and Management
Years Experience: 2
Education/Degree: BA Environmental Studies

Annikki Chamberlain

Annikki Chamberlain

Water Resource Analyst and Training Specialist

Service/Discipline: Water Resource Planning and Management
Years Experience: 12
Education/Degree: M.S. in Climate Science and Solutions

Team Member Bios



Michelle Maddaus, PE

Michelle Maddaus is a registered civil engineer in California and has a wide variety of work experience in the water resources field. Michelle has been Project Manager for dozens of water conservation plans since 2003. A few of the more recent completed plans include:

She also served as Project Manager for the 2010/2011 Urban Water Management Plans for South Tahoe Public Utilities and Suisun-Solano Water Authority, and a Water Conservation and Implementation Plan for San Luis Obispo County’s Los Osos Service Area.

Michelle is a seasoned conservation program designer in both the indoor and outdoor environments. Michelle has conducted over a hundred CII audits, which has given her hands-on experience with the equipment and program needs of California’s water customers. Her water audit experience includes facilities in Sonoma County, the City of Burlingame, University of California Santa Cruz, and the Stanford Linear Accelerator and Stanford University Campus, to name a few. Michelle is also an experienced trainer, having conducted in-person trainings for over 150 clients on the use of the DSS Model.

She is affiliated with the American Water Works Association (AWWA) and is their immediate past chair of the Climate Change Committee, which she helped launch in 2008 and now has over 80 members nationwide. In March 2012, Michelle won the OASIS award from AWWA for her leadership for the Climate Change committee. In June 2012, Michelle was featured on the cover of the AWWA Opflow magazine. The Opflow article, written by the MWM Team, focused on including water conservation in the portfolio of future water options for utilities to allow sustainable water management. Michelle is currently working on conservation Master Plans for the City of Anaheim and City of Corona, both in California. Michelle has a B.S. in Civil and Environmental Engineering and a Master’s in Business Administration (M.B.A.) from UC Davis.

Lisa Maddaus, PE

Lisa Maddaus is a senior water resources engineer with experience preparing water resources planning studies for water suppliers across the country. Her passion is integrated water resources planning, and her specialty is in conservation, drought and climate change planning. Lisa has presented numerous papers on integrated water resource planning, water conservation, demand management and drought preparedness at AWWA National and International Water Association conferences and for the United Nations. Lisa is also the co-author of the American Water Works Association, Manual of Water Supply Practices, M52 – Water Conservation Programs - A Planning Manual and supporting authors to other AWWA Manuals including: M60 – Drought Preparedness and Response, M50 – Water Resource Planning and M36 – Water Audits and Loss Control Programs. She led our team in preparing the International Water Association publication, Preparing Urban Water Use Efficiency Plans.

Lisa was formerly Vice Chair on the Board of Directors for the California Water Efficiency Partnership and previously staff as a Technical Adviser. Lisa has been the AWWA California-Nevada Section instructor for the Water Use Efficiency Practitioner workshops for exam preparation. She has completed more than 150 conservation and drought planning studies and takes an especially pragmatic approach given her over four years’ experience managing the Regional Water Authority’s Water Efficiency Program in the Sacramento region in Northern California. At RWA, Lisa helped the 22 water provider members fulfill best management practices for water conservation and was responsible for the daily management of a $2 million budget. Lisa has a B.S. and M.S. in Civil and Environmental Engineering from UC Davis.

Chris Matyas

Chris Matyas is a computer software engineer with experience in the software and civil engineering fields and has a wide variety of work experience in both the software design and water resources fields. Chris has worked on large and small software products, including software packages distributed on HP, Lenovo and DELL personal computers and laptops. Chris is an expert in multiple programming languages including C++, C#, Java, Python, VBA and many more.

Chris recently completed a thirty-year water demand forecast for the wholesale customers of the Sonoma County Water Agency, which included working with nine different water utilities (seven individual water demand forecasting DSS Models). Water demand forecasts were prepared and adopted by the contractors and three levels of conservation program savings were evaluated. Chris has also developed a Water Audit Tool for commercial audits that is currently in use by the San Francisco Public Utilities Commission staff. Chris is currently working on an iPad application for commercial water audits. His recent experience also includes the preparation of the demand forecasts and conservation program updates for the City of Santa Barbara, City of Oceanside, Marin Municipal Water District, the Los Osos service areas, City of Sacramento, and Columbus, Ohio. Chris has a B.S. in Civil and Environmental Engineering from UC Davis.

Tess Kretschmann

Tess Kretschmann is a water resources engineer with project management experience in community, nationally, and internationally based environments. She has 12 years of experience preparing water resources planning studies for urban water suppliers. Recently, Tess was part of the team that worked on a thirty-year water demand forecast for the wholesale customers of the Sonoma County Water Agency (nine different water agencies), which included working on the development of nine individual water demand forecasting DSS Models. Tess has specialized in innovative program development utilizing sustainable approaches primarily in the non-profit sector. She is experienced in preparing water efficiency and master planning studies for water systems which include water demand projections and cost effectiveness evaluations. She has prepared urban water management plans for multiple water systems throughout California. Tess participated in the numerous modeling efforts for regional clients analyzing water system reliability, potential system conservation savings, and system drought reliability, vulnerability and resiliency. She has led corporate sustainable development teams, focusing on water and energy use efficiency projects. She has also managed and coordinated projects of $10,000 - $150,000 with teams of up to fifteen people and served as project engineer on $50,000 - $2,000,000 projects. She has created strategic visioning models representing regional water supplies and demands, simulating various drought, supply, demand, and climate change scenarios.

Tess has prepared and evaluated drought plans, integrated water resource plans, groundwater management plans, and agricultural and urban water management plans. She has participated in competitive grant writing efforts, helping applicants receive awards of over $8 million on behalf of regional consortiums. In 2014, she was part of the team awarded a Regional Water Authority grant for 2.5 million. She has led workshops on drought management, master planning, and urban water management planning and has managed permitting efforts for local, state, and federal infrastructure facilities (water tanks, pump stations, etc). As past vice chairperson of the Utilities Rate Advisory Commission in Sacramento, California, Tess reviewed and commented on proposed changes to utility service rates for water, sewer, garbage, recycling, yard waste, and street sweeping services and advised on utility rate changes that were subsequently majority approved. She led public City hearings about utility service rates and collected public feedback. Tess has a B.S. in Civil and Environmental Engineering from Duke University.

Andrea Pacheco

Andrea Pacheco is a resourceful executive administrator with project management and coordination experience in the engineering, technology, publishing, and advertising fields. She has expertise in detail management, editing, organizational systems development, and problem solving. Her experience in graphic design and development adds an extra flare to her work, allowing her to exercise her creative abilities as well. Andrea has prepared, written, and edited documentation to support the development of water use efficiency plans, technical memoranda, water survey reports, water conservation master plans, proposals, and more. She was recently part of the team working on a thirty-year water demand forecast for the wholesale customers of the Sonoma County Water Agency (nine different water agencies), which included working on the development of nine individual water conservation reports.

Andrea is primarily responsible for providing direct analytical and administrative support to the Maddaus Water Management Project Managers as well as sourcing information from team members to support the PMs in decision making. Andrea is currently reformatting the style guide for MWM. Her education includes a B.A. in English from St. Mary’s College of California.

William Maddaus, PE, CLIA

William Maddaus is a registered civil engineer with experience in water resource planning and management. In 1995, he founded Maddaus Water Management (MWM), an independent consulting practice. Through MWM, he offers technical assistance to water utilities in developing and evaluating water conservation programs. Over his career, William has established himself as an expert in urban water conservation. His list of publications include:
From 1999-2002 he was chair of an AWWA national committee, Water Resource Planning and Management. In 2008, the California Urban Water Conservation Council bestowed on him their highest award, the Mike Moynahan Excellence Award. In October 2011, he was awarded the Alliance for Water Efficiency Water Star Award, the Alliance’s most respected nationwide honor for his nearly five decades of dedication to the water conservation field.

William pioneered comprehensive conservation planning for water utilities, using cost-effectiveness analysis, and evaluating water savings from completed programs. He has prepared hundreds of water conservation planning studies for water agencies nationally and internationally. The Urban Water Conservation Best Management Practices, an innovative approach to water conservation in California, were developed with his assistance on program design. He also derived the original basis for projecting water savings. William has prepared UWMPs complying with state guidelines for numerous water agencies in California over the past three decades. As needed, William has provided expert witness services to public agencies.

His academic background includes a B.S. in Civil Engineering from UC Berkeley and an M.S. and C.E. from MIT, where he specialized in water resources. He is a member of the American Academy of Environmental Engineers, American Water Works Association, and the American Society of Civil Engineers (Fellow). William is a registered Irrigation Association (IA) Member, Certified Landscape Irrigation Auditor (CLIA), and has conducted hundreds of inspections of landscapes and irrigation systems.

Hannah Braun

Hannah Braun is a water use efficiency analyst with experience in monitoring water quality and conducting water efficiency audits. Hannah has extensive direct experience with water customers, including conducting water audits for multi-family residences and businesses; engaging with community members at local events to educate customers about water conservation efforts; and processing rebates from both CII customers and single-family residences. Hannah has experience working with water data in Excel, specifically with QA/QC, tracking, analyzing, and report generation. She has prepared water use efficiency reports for businesses participating in water efficiency audits. In addition, she has worked with ArcGIS utilizing the ArcMap feature by digitizing landscape types in efforts to create water budgets for large landscape customers. Hannah has a B.A. in Environmental Studies from the University of California, Santa Cruz.

Annikki Chamberlain

Annikki Chamberlain is a Water Resource Analyst and Training Specialist with 12 years of experience in many facets of water management, including water supply, watershed and climate science, wastewater treatment, and water policy. She first became interested in studying water while she was a wildland firefighter and witnessed the impacts of catastrophic fire on water resources. Later, as she became more aware of diminishing water quality and quantity across the planet, she became involved in water efficiency opportunities in the built environment. She is enthusiastic about leveraging data and technology to drive water efficiency and resource management.

Annikki has served as a water quality field technician, a wastewater treatment plant operator, an environmental engineer, a water educator, and a water resource coordinator; implemented water conservation programs in industrial and municipal settings; and served as one of two experts on the US Committee for the development of the ISO 14046:2014 Environmental management — Water footprint — Principles, requirements and guidelines standard. Specializing in irrigation and cooling tower assessment, she has conducted more than 50 water audits across residential and commercial properties.

In addition to her technical interest in water management, Annikki is passionate about water education and training for youth and adults. Annikki has developed and implemented water education curriculum in more than 40 elementary and junior high schools that focused on plant water use and irrigation efficiency, life cycle assessment, the urban water cycle, and wastewater treatment. She also has served as the lead trainer for environmental and industrial processes for over 200 employees.

Annikki has a B.S. in Watershed Science from Colorado State University and an M.S. in Climate Science and Solutions from Northern Arizona University.