National Park Service

Sierra Nevada Network (SIEN)

About the Sierra Nevada Network

Our network works closely with park staff to plan and conduct inventory and monitoring in Sierra Nevada Network parks. Our Board of Directors and Steering Committee play important roles in guiding decisions and integrating inventory and monitoring information into park programs. We also work with numerous outside cooperators from universities, other government agencies, and non-government organizations to get the variety of technical expertise needed to develop a long-term monitoring program. Please explore this site to learn more about our organization or contact us for more information.

Sierra Nevada Network Staff Contacts

Name Title/Position Phone Number Profile
Sylvia Haultain Program Manager 559-565-3788 Profile
Alex Eddy Data Manager 559-565-3709 Profile
Jonny Nesmith Ecologist 559-565-3765 Profile
Andi Heard Physical Scientist 559-565-3786 Profile
Jenny Matsumoto Administrative Technician 559-565-3787 -
Linda Mutch Communication Specialist 559-565-3174 Profile

Sierra Nevada Network Board of Directors

The Board of Directors includes the Superintendents of the Sierra Nevada Network (SIEN) parks and the SIEN Program Manager serves as staff to the Board. The Board will ensure that the SIEN Inventory and Monitoring program implements scientifically credible standards while serving the needs of network parks. They promote accountability for the program by reviewing progress and results to ensure goals and targets are being achieved.

  • Chip Jenkins, Acting Superintendent, Yosemite National Park
  • Woody Smeck, Superintendent, Sequoia and Kings Canyon National Parks
  • Deanna Dulen, Superintendent, Devils Postpile National Monument
  • Ruben Andrade, Superintendent, César E. Chávez National Monument
  • Lisa Garrett (non-voting), I&M Program Manager, Pacific West Region
  • Chip Jenkins (non-voting), Deputy Regional Director, Pacific West Region

Sierra Nevada Steering Committee

The Steering Committee guides Sierra Nevada Network (SIEN) Inventory and Monitoring (I&M) planning activities, operations, and technical aspects of program development and implementation to ensure program accountability and relevance to resource stewardship in SIEN parks. To achieve these ends, the Steering Committee provides logistical, scientific, and technical guidance to the SIEN program and advises the Board of Directors regarding I&M work plans, annual reports, and monitoring protocols.

  • Deanna Dulen, Superintendent, Devils Postpile National Monument
  • Christy Brigham, Chief - Resources Management & Science, Sequoia & Kings Canyon National Parks
  • Joe Meyer, Acting Chief - Resources Management & Science, Yosemite National Park
  • Sylvia Haultain, I&M Program Manager, Sierra Nevada Network
  • Lisa Garrett (non-voting), I&M Program Manager, Pacific West Region

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Sylvia Haultain, Program Manager

Primary Responsibilities

Oversight of Sierra Nevada Network Inventory & Monitoring Program, coordination with parks and other entities, supervision of program staff.

Sylvia Haultain

Education/Experience/Areas of Expertise

Sylvia joined the Sierra Nevada Network in April of 2015. Prior to this new role, she spent 18 years as a program manager in the Division of Resources Management and Science at Sequoia and Kings Canyon National Parks. As plant ecologist for the two parks, she oversaw the Stock Use and Meadow Monitoring program, provided subject matter expertise in botany and vegetation ecology, and played a lead role in the development of the recently completed Wilderness Stewardship Plan.

She worked closely with the Inventory & Monitoring Program from its inception, overseeing the rare plant inventories at Sequoia, Kings Canyon, and Devils Postpile and the vegetation mapping project at Sequoia and Kings Canyon. She contributed to the selection of vital signs for long-term monitoring and was closely involved in the development of the Wetland Ecological Integrity protocol. She also spent seven years as a field botanist with the Sequoia and Kings Canyon Natural Resource Inventory project, which documented the distribution and abundance of vascular plants throughout the two parks.

A three-month internship in Sequoia National Park in the early 1980s turned into a career-long love affair with the wild landscapes of the Sierra Nevada, and she has yet to tire of exploring, studying, and sharing the extraordinary biodiversity found here. She holds a B.S. in Natural Resources from Humboldt State University and a M.S. in Ecology from the University of California at Davis.

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Alex Eddy, Data Manager

Alex Eddy

Primary Responsibilities

Develop and promote sound data management practices.

Education/Experience/Areas of Expertise

Alex joined the Sierra Nevada Network in November 2016. Her primary interests lie in the nexus between the environment and society, focusing on leveraging data and technology to support resource decision-making and responsible environmental stewardship. She works with network and park staff and cooperators to develop and promote effective data and information management practices that enhance and protect the value of long-term monitoring datasets. Alex has a strong foundation in science and geospatial theory provided by a B.S. in Geography (with a specialization in GIS and Analytical Cartography) and a M.A. in Geography (with a specialization in Society and the Environment), both from Ohio State University.

Previous experience in public service includes positions at state and local government, and she has worked in several academic environments dedicated to exploring landscape-level environmental issues. Alex previously worked for the National Park Service as a Cartographic Technician at Sequoia and Kings Canyon National Parks, as well as Gateway National Recreation Area and the National Parks of New York Harbor.

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Jonny Nesmith, Ecologist

Jonny Nesmith

Primary Responsibilities

Lead for high-elevation forest and wetlands monitoring projects.

Education/Experience/Areas of Expertise

Jonny joined the Sierra Nevada Network in April 2012. He graduated from UC Berkeley in 2011, where he earned his Ph.D. from the Department of Environmental Science, Policy and Management. His dissertation research focused on the effects of prescribed fire on sugar pine mortality in Sequoia and Kings Canyon National Parks. Prior to attending UC Berkeley he earned a M.S. in Forest Science from Oregon State University and a B.A. in Biology from UC Santa Cruz.

He has an extensive history of working in the Sierra Nevada as a biological science technician, field crew supervisor, and ecologist, beginning in 1998 with the USGS Sequoia and Kings Canyon Field Station. More recently, he has worked for the USGS Redwood Field Station on a project investigating the effects of climate change on fire severity and forest dynamics throughout the western United States.

Jonny grew up in the Bay Area and has spent most of his summers exploring and working in the Sierra Nevada. His hobbies include mountain biking, backpacking, and rooting for the San Francisco Giants with wild abandon.

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Andi Heard, Physical Scientist

Andi Heard

Primary Responsibilities

Lead for lake monitoring, river monitoring, and climate reporting projects.

Education/Experience/Areas of Expertise

Andi has worked with the Sierra Nevada Network since 2004 on vital signs planning and monitoring related to water resources and weather and climate. She previously worked for NPS and USGS in Sequoia and Kings Canyon National Parks supporting watershed and air quality research and monitoring, a study on the effects of contaminants on amphibians, and research related to fire and non-native plants. Andi has a B.S. in Chemistry from the University of California, San Diego, a M.S. in Watershed Science from Colorado State University, and a Ph.D. in Soil and Water Science from the University of California, Riverside. Her areas of interest include water quality and biogeochemistry.

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Linda Mutch, Science Communication Specialist

Linda Mutch

Primary Responsibilities

Work with other network staff and cooperators to communicate inventory and monitoring results through a variety of methods, with park staff being the primary audience. Support protocol development and implementation.

Education/Experience/Areas of Expertise

Linda worked as the Sierra Nevada Network Program Manager from 2002 through 2009, and left this position in January 2010 to pursue her interest in science communication through a new role with the network. Prior to joining the network, she worked as a 5th grade teacher, an Ecologist with the USGS Sequoia and Kings Canyon Field station studying forest population dynamics, a biological technician with the National Institutes of Health in Montana, and a park or biological seasonal technician in numerous western national parks. Her primary interests include fire ecology and forest dynamics, as well as science education and communication. She has a B.A. in Biology from the University of Oregon, a M.S. in Watershed Management from the University of Arizona, and an elementary school teaching credential from California State University, Fresno.

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