Executive Team

Karla Nemeth was appointed Director of the California Department of Water Resources by Governor Edmund G. Brown Jr. on January 10, 2018, and was reappointed by Governor Gavin Newsom on June 28, 2019.

DWR operates and maintains the California State Water Project, manages floodwaters, monitors dam safety, conducts habitat restoration, and provides technical assistance and funding for projects for local water needs. Nemeth oversees the Department and its mission to manage and protect California’s water resources, working with other agencies in order to benefit the State’s people and to protect, restore and enhance the natural and human environments.

Nemeth worked at the California Natural Resources Agency as Governor Brown’s deputy secretary and senior advisor for water policy since 2014. She was Bay Delta Conservation Plan project manager from 2009 to 2014.

Nemeth was environmental and public affairs director for the Alameda County Flood Control and Water Conservation District from 2005 to 2009. She was community affairs manager at Jones and Stokes from 2003 to 2005.

She has a Master’s degree in public administration from the University of Washington.

Cindy Messer was appointed as Lead Deputy Director in February 2017. Prior to her appointment, Messer served as a subject matter expert and policy advisor to the director and former chief deputy director on a broad range of issues impacting statewide water management. She briefly served as acting director in the summer of 2017 after Mark Cowin retired and prior to Grant Davis' appointment.

Messer was the deputy director of the Planning, Performance, and Technology Division at the Delta Stewardship Council from 2012 until her appointment with DWR. As deputy director, she coordinated the preparation and implementation of the Delta Plan. Prior to this position, Messer served as the assistant executive officer for the Sacramento-San Joaquin Delta Conservancy where she provided oversight for development of the Delta Conservancy’s Interim Strategic Plan. Messer also worked for more than 10 years in various technical and managerial roles in DWR's Division of Environmental Services.

John Andrew was appointed Deputy Director, Climate Resilience, on Nov. 2, 2021. He advises and assists the Director in the formulation, revision, and implementation of policies and programs related to climate resilience. Previously, he was Assistant Deputy Director, and has served as the Department’s Executive Manager for Climate Change since 2006.

Andrew joined DWR in 1997 in the Delta Planning Branch. His previous managerial assignments with the Department include Chief of Fish Facilities and Chief of Special Planning Projects. He also served as the Drinking Water Quality Program Manager of the CALFED Bay-Delta Program. His other organizational affiliations include the Stege Sanitary District, California Department of Health Services, US Environmental Protection Agency, and Lawrence Berkeley National Laboratory.

Andrew earned a B.S. degree in Civil Engineering and Master of Public Policy degree from the University of California at Berkeley.

Ted Craddock was appointed Deputy Director of the California State Water Project (SWP) on May 18, 2020. He was previously acting SWP Deputy Director since July 2019. In this role, Craddock oversees a workforce of more than 2,000 employees who are responsible for the operation of the SWP. The SWP is one of the world’s largest water and power systems and provides water to more than 27 million Californians.

Prior to this role, Craddock served as Assistant Deputy Director of the SWP and Chief of DWR’s Hydropower License Office. Craddock has led several important DWR efforts including the Oroville Spillways reconstruction and extension of the SWP’s East Branch system. The American Society of Civil Engineers awarded Craddock with the Outstanding Projects and Leaders award in 2020 and the Outstanding Civil Engineer in the Public Sector award in 2018.

Craddock is a registered Professional Engineer and holds a degree in Civil Engineering and Materials Science Engineering from the University of California, Davis. 

Thomas Gibson was appointed General Counsel at DWR in June 2021, overseeing the Office of General Counsel. He provides legal advice to the Director and DWR management and oversees approximately 50 attorneys. The Office of General Counsel is responsible for a broad range of issues, including water rights; water transfers; energy law; flood management; integrated water management; dam safety; personnel; and state contracting.

Thomas was previously Undersecretary, Deputy Secretary and Special Counsel for Water, and General Counsel for the California Natural Resources Agency as well as General Counsel for the California Department of Fish and Wildlife. Prior to joining the State, he was a Partner at the law firm of Best, Best & Krieger LLP and an Associate at the law firms of Hyman, Phelps & McNamara P.C. and Kronick, Moskovitz, Tiedemann & Girard.

Thomas earned a Juris Doctor degree cum laude from the Northwestern School of Law of Lewis & Clark College.

Paul Gosselin was appointed Deputy Director for Sustainable Groundwater Management on July 9, 2021. In this capacity, Gosselin will oversee the Sustainable Groundwater Management Office, which includes statewide groundwater management activities and the implementation of the Sustainable Groundwater Management Act (SGMA). Gosselin has extensive experience in local groundwater management, and environmental regulations and leadership.

Gosselin joined the Department after serving 13 years as Butte County’s Director of Water and Resource Conservation.  He managed Butte County's State Water Project Table A allocation, investigated and reported on groundwater conditions, implemented the Groundwater Management Plan, fostered regional partnerships through the Northern Sacramento Valley Integrated Regional Water Management and other water resource activities. Gosselin led Butte County’s drought response as chair of the Butte County Drought Task Force, while also leading sustainable groundwater management efforts through the implementation of SGMA. He oversaw the development of three Groundwater Sustainability Plans and was administrator of two Groundwater Sustainability Agencies. Gosselin has a passion for advancing innovative scientific approaches.  He was an early adopter and collaborator of innovating technologies to further understand geologic conditions important to groundwater management. His leadership paved the way for the statewide initiative to map groundwater basins with airborne technologies. 

Prior to Butte County, Gosselin was Chief Deputy Director at the California Department of Pesticide Regulation from 1999 to 2007 and was Assistant Director for Enforcement, Environmental Monitoring and Data Management from 1993 to 1999. During his tenure, he developed regulatory programs to protect surface and groundwater quality. From 1989 to 1993, he was the Director of Regulatory Services for the Massachusetts Department of Food and Agriculture.

Gosselin received a Bachelor of Science degree in biochemistry and a Master of Science degree in chemistry from the University of Massachusetts.

John Paasch was appointed Security and Emergency Management Program Deputy Director on June 26, 2021.

Paasch provides executive-level policy direction, coordination, and leadership for Department emergency management and security programs.

Paasch joined DWR in 2009 as a levee inspector and flood fight specialist and has served in numerous emergency management positions within the Department’s Flood Management Division. Most recently, Paasch managed the Hydrology and Flood Operations Office overseeing a multi-disciplinary team of managers, engineers, programmers, scientists, technicians, and analysts to deliver data, tools, and expertise in support of real-time water management with numerous state, federal, and local partners.

Paasch is a licensed Professional Engineer and earned a Bachelor of Science degree in Bioresources and Agricultural Engineering form Cal Poly, San Luis Obispo. He also earned a Certificate in Business and a Master of Engineering degree in Civil Engineering from Texas A&M University, College Station.

Kasey Schimke was appointed assistant director of the Legislative Affairs Office in May 2007. His responsibilities include monitoring and guiding legislation and representing us before the State Legislature. He also assists the director in policy discussions with the Governor's Office, government agencies, and private groups.

Prior to his appointment, Schimke served as personal staff to several members of the California State Legislature for more than 8 years. From 2000 to 2005 he served as staff to the Assembly Budget Committee. Schimke's assignment to the Committee included reviewing the budgets of the departments of the Resources Agency, CalEPA, and the Department of Food and Agriculture. During this time, he was involved in reviewing funding proposals and crafting implementing legislation relating to the nearly $9.3 billion in environmental protection bonds approved by voters between 2000 and 2002. From 2005 to 2007, Schimke served as staff to State Senator Denise Moreno Ducheny, where he worked on a broad range of issues, including water policy, state budget, social services, agriculture, Indian gaming, and tribal sovereignty.

Bianca Sievers was appointed Deputy Director for Special Initiatives at the Department of Water Resources on October 15, 2021. In this capacity, Sievers will be working to implement the Department’s Human Right to Water Policy; build and strengthen partnerships with vulnerable communities and environmental justice organizations; and align Department strategic thinking and actions related the Water Resilience Portfolio, DWR Strategic Plan, and organizational health efforts. Sievers has been Policy Advisor to the Director of the Department of Water Resources since 2018.

Sievers held multiple positions at the Governor’s Office of Business and Economic Development from 2014 to 2018, including Senior Business Development Specialist and California Competes Tax Credit Specialist. Sievers was Legislative Assistant for the Office of Governor Edmund G. Brown Jr. from 2012 to 2014. Sievers earned her Master of Business Administration from the University of California, Davis, Graduate School of Management, and Bachelor of Arts in Political Science and Economics from the University of California, Davis.

Kristopher A. Tjernell was appointed Deputy Director of the Integrated Watershed Management Program on May 14, 2018. This position is responsible for advancing policies and programs that integrate and provide multiple benefits including flood management, local water supply, and ecosystem restoration. Tjernell oversees the Division of Integrated Regional Water Management, the Division of Statewide Integrated Water Management, the Climate Change Office, and DWR’s EcoRestore Program.

In 2014, Governor Edmund G. Brown Jr. appointed Tjernell to the position of Special Assistant for Water Policy at the California Natural Resources Agency (CNRA) where he accelerated and coordinated implementation of Yolo Bypass flood and habitat restoration projects, California EcoRestore projects and related planning, and other actions to further the California Water Action Plan. Tjernell worked closely with Secretary John Laird to develop and negotiate proposed voluntary settlement agreements for each of the major Delta tributaries as part of the State Water Board’s ongoing Bay-Delta Water Quality Control Plan process. 

Prior to his appointment with CNRA, Tjernell was a policy consultant for Conservation Strategy Group, LLC, where he specialized in integrated water management, Sacramento-San Joaquin Delta restoration and governance, ESA/CESA issues, land conservation, water supply, ecosystem conflict resolution, and public finance. Tjernell advised a broad array of local public water agencies and non-governmental organizations to advance their federal, state, and local natural resource funding and policy objectives.  

Tjernell graduated from the University of California, Santa Cruz, with a Bachelor of Science degree in Ecology and Evolutionary Biology.

Stephanie Varrelman was appointed Deputy Director of Business Operations in May 2022. In this position, Varrelman is responsible for all Business Operations functions for the Department including fiscal management, human resources, procurement and contracting, facilities management, printing and mail, and information technology services. Additionally, Varrelman oversees bond accountability functions, as well as the Electric Power Fund and Wildfire Charge Fund programs.

Prior to assuming this position, Varrelman served as the Department’s Equal Employment Opportunity Officer and managed the Office of Workforce Equality. In this role, Varrelman launched DWR’s participation in the Capitol Collaborative on Race and Equity team and oversaw many Diversity, Equity, and Inclusion initiatives across the Department. In addition, Varrelman held the position of Policy Advisor to the prior two Deputy Directors for Business Operations and served in a variety of other policy and administrative positions in Executive and Business Operations, including as Administrative Officer for DWR’s Departmental Services Office. During her tenure, Varrelman has also served on project teams for enterprise initiatives including DWR’s Safety Project, Enterprise Budget Planning Project, and Next Wave SAP Migration project.

Varrelman earned a Bachelor of Arts degree in History from the University of California, Davis, and a Master of Arts degree in History from California State University, Sacramento.

Anecita Agustinez has served as our tribal policy advisor since August 2013. Agustinez has over 30 years of advocacy experience on behalf of California’s Native American tribes. She provides policy support and recommendations regarding tribal issues to the director and chief deputy director and has been actively engaged with our projects and programs, assisting with tribal consultation and development of the DWR Tribal Consultation Policy.

Michael Anderson is the State Climatologist for California, a collaborative position between the State and the National Oceanographic and Atmospheric Administration (NOAA) to provide climate data services for California. He also manages the State’s Atmospheric River Research Program and serves as a subject matter expert on climate for DWR and other State agencies.

Anderson earned a Ph.D. in Civil and Environmental Engineering from the University of California, Davis and completed post-Doctoral work at UC Davis in hydroclimate system modeling.

Louise Conrad joined DWR as its Lead Scientist in July 2022. The Lead Scientist position provides science leadership for the agency by ensuring and advancing best practices and capacity for conducting science, by tracking and prioritizing scientific initiatives and direction, and by providing science-related policy guidance to the DWR Directorate.

Prior to serving as the Lead Scientist, Conrad was the Deputy Executive Officer for Science at the Delta Stewardship Council, where she focused on science funding processes, science communication, and coordination of scientific initiatives to inform decision-making for Sacramento-San Joaquin Delta. She worked for DWR from 2010 to 2019 within the Division of Integrated Science and Engineering where she conducted research in floodplain ecology, impacts of drought on the Delta ecosystem, control of invasive aquatic weeds, and worked closely with the Interagency Ecological Program to advance synthesis of long-term environmental monitoring datasets. Prior to working in the Delta system, Conrad worked for the Pacific States Marine Fisheries Commission in the Russian River watershed of California, co-managing a captive broodstock and reintroduction program for endangered coho salmon.

Conrad is a fisheries biologist by training and earned her Ph.D. in Animal Behavior from the University of California, Davis in 2008.

Mabel Lun was appointed Manager of the Internal Audit Office in March 2023, overseeing the internal audit and investigative units at DWR. Mabel is responsible for directing all activities and resources of the Internal Audit Office and implementing the statewide auditing function for DWR. The Internal Audit Office is responsible for evaluating the adequacy of the Department's internal controls over its resources, programs and functional areas and ensure its compliance with laws, regulations and standards.

Mabel has more than 18 years of combined experience in internal audit and public accounting. Prior to joining DWR, Mabel held various roles including Internal Audit Manager at PRIDE Industries, Principal Auditor at VSP Global and Audit Senior with the public accounting firm Ernst & Young.

During her tenure in the private sector, Mabel oversaw various types of engagements including financial, operational, regulatory and IT audits as well as business continuity, disaster discovery, data analytics, cybersecurity maturity model certification (CMMC) and enterprise risk assessment.

Delphine Hou was appointed Deputy Director for Statewide Water and Energy at the Department of Water Resources in January 2023. In this capacity, Hou oversees the Electricity Supply and Strategic Reserve Office, which is responsible for securing and deploying new and existing power generation to support California during extreme events such as extraordinary heatwaves, devastating wildfires, severe drought, and other disruptions to electric reliability.

Prior to her appointment, Hou was the Director of California Regulatory Affairs at the California Independent System Operator (CAISO) where she was responsible for engagement with state agencies on all CAISO-related issues including electric reliability, the wholesale electricity market, and transmission planning.  Prior to the CAISO, Hou was in private consulting focused on transmission planning in electricity wholesale markets at The Brattle Group and ICF International.  Hou earned her Master of Arts in Law and Diplomacy from The Fletcher School at Tufts University, and Bachelor of Science in Finance and International Business at the Stern School of Business at New York University.