Meet Our Chief Executive Officer


Stephanie Sklar joined the Sonoran Institute as its Chief Executive Officer in October 2014. Prior to joining the Sonoran Institute, Stephanie served as Director of  Development for the Institute of the Environment at the University of Arizona since 2010. At the U of A, Stephanie was responsible for directing and managing all fund development activities for the Institute. Prior to working for the University of Arizona, she was the Executive Director of Social Venture Partners of Greater Tucson from 2007 – 2010. Sklar was formerly the Executive Director of the Arizona League of Conservation Voters, Arizona’s largest member-supported statewide conservation organization with offices in Tucson and Phoenix. Before moving to Arizona in 1994, Sklar was Vice President for Public Affairs for the National Wildlife Federation, the largest environmental education organization in the US. While in DC, she also served as Vice President for Communications at The Nature Conservancy in Arlington, VA, and was appointed by President Reagan as Communications Director for the President’s Commission on Americans Outdoors. She also was an Associate Director of the Small Business Center for the Chamber of Commerce of the United States. A graduate of Vassar College, Sklar earned her M.A.T. in English from Brown University and studied post-graduate business at George Washington University.

ALL Tucson Phoenix Mexicali
Celedonia Alvarado Camacho
Restoration Assistant
Michael Blimes
Director of Development
520-290-0828 ext 1150

Michael Blimes joined the Sonoran Institute in 2019. He is Director of Development and is responsible for ensuring the philanthropic support of the Sonoran Institute that is so necessary to sustain and expand programs. Michael has been a professional fundraising executive or consultant with a wide range of local, national and international nonprofit organizations. He holds a Bachelor of Arts degree with a major in journalism from The Ohio State University, where he also began his fundraising career. He has pursued graduate studies in interdisciplinary communications at Ohio State and international marketing at what is now the Thunderbird School of Global Management at Arizona State University. He spends his free time enjoying desert life in Tucson with his wife, Karla, their Singapura cat, Pixie Dust, and their Chihuahua, Chili Pepper.

Leticia Brumbaugh
520-290-0828 ext 1103

Leticia Brumbaugh joined the Finance Department of the Sonoran Institute as the Payroll Coordinator in April 2018.  She is responsible for biweekly payroll processing. She has more than 30+ years in Accounting. She holds a BS in Business Administration from the University of Phoenix. Before joining Sonoran Institute she worked in several settings including nonprofits, municipalities and education.  She enjoys hiking, camping and other outdoor activities, and is happy to be contributing to the continued success of the Sonoran Institute.  

Elise Christmon
Development Coordinator
520-290-0828 ext 1149

Elise has been working as Development Coordinator for the Sonoran Institute since November 2016 assisting with fundraising and development activities. She graduated from Oberlin College with a degree in Art History and German, specializing in medieval art. Upon graduating Elise returned to her home town of Tucson and began working in the nonprofit arts community specializing in business, operations, and development. Outside of work Elise enjoys volunteering her time helping animals, children, the outdoors, or a combination of all three. She is a dog and chicken enthusiast and hopes to someday welcome goats into her family.

Luke Cole
Associate Director for Resilient Communities and Watersheds
520-290-0828 ext 1112

Luke became the Associate Director for Resilient Communities and Watersheds upon joining the Sonoran Institute in 2018. Luke manages the ongoing projects on the Santa Cruz River, working with staff and collaborators to restore and enhance this Living River in the heart of southern Arizona and northern Sonora. Prior to joining the Sonoran Institute, Luke worked for the Washington, D.C. city government tracking the District’s green infrastructure and water quality improvement programs with a focus on coordinating tree planting programs and policy. Luke has a Ph.D. in Environmental Sciences from the University of Virginia, an M.S. in Oceanography from the University of Rhode Island, and a B.A. in Biology from St. Mary’s College of Maryland.

Angelica Cruz Favela
Grants and Contracts Manager
520-290-0828 ext 1102

Angelica Favela, Grants & Contracts Manager joined in 2016. Her primary responsibilities include compliance, monitoring and financial reporting, budgetary review, and invoicing funders. She works closely with Program Directors and staff to insure that grant budgets and financial reporting needs are met. Angelica earned a Bachelor of Arts degree in Political Science from the University of Arizona. Prior to joining SI Angelica was with the Pascua Yaqui Tribe from 2007-2016. During her time at the Pascua Yaqui Tribe, Angelica worked in the Finance Department in several accounting fields, which included Accounts Payable, Enterprise Fiscal Analyst and Senior Grants & Contracts Accountant. Angelica is a proud member of the Pascua Yaqui Tribe she loves to garden, ride in El Tour de Tucson and spend time with her family.

Elizabeth Díaz
Ecological Estuarine Monitoring Coordinator
+52-686-582-54-31 Ext. 110

Elizabeth Díaz is the Ecological Estuarine Monitoring Coordinator. She collects information on ecological environmental parameters to establish the baseline health of monitored sites in the Colorado River estuary, as well as to determine scientific processes and methodologies that can be implemented through public policies. She studied Biology at the Autonomous Metropolitan University (UAM) in México City. Elizabeth has a certification as a Chemical Laboratory Technician and a Master’s Degree in Health Sciences from the Autonomous University of Baja California (UABC). What she likes most is playing the violin and the cello, listening to music and going to concerts. She enjoys her work very much because it contributes to environmental and social well-being.

Guadalupe Fonseca Molina
Restoration Field Coordinator
Toni Garcia-Bullington
Executive Assistant
520-290-0828 ext 1113

Toni joined the Sonoran Institute staff in 2016 and serves as the Executive Assistant to the Chief Executive Officer. Her responsibilities include being the primary point of contact for all matters pertaining to the CEO. She also serves as liaison to the board of directors and senior management teams; and oversees special projects.

Gabriela González Olimón
Environmental Education and Investigation Coordinator - Colorado River Delta Program
+52 686-564-9399

Gabriela is the Environmental Education and Investigation Coordinator for the Colorado River Delta Program at Sonoran Institute Mexico, A.C. in the Mexicali, Baja California. Since joining in 2016, Gaby focuses on promoting ecological restoration in communities near the Delta, coordinating school and community presentations and workshops, guiding interpretive walks in our restoration sites and developing the environmental education program. She holds a BS in Biology from Autonomus University of Baja California and has implemented environmental education programs in Baja California, Grand Canyon National Park, and in an ecology school in Maine. While exploring forests and deserts and climbing rocks for fun, she became passionate about fuzzy and feathered creatures from an early age. She also has experience in wildlife monitoring, especially the endangered California condor and bats. Gaby aims to inspire youth to be out in nature, she loves exploring new places and cooking.

Rabi E. Hernandez
Urban Projects Communication Coordinator
+52 686-582-54-31

Rabi is responsible for advising, developing, designing and implementing communication and dissemination strategies for our urban projects in Mexicali, including our Mexicali Fluye campaign. He joined the Sonoran Institute at the end of 2016, and previously worked as a freelancer, advising on marketing and corporate design for small businesses; event photography; community management; and generating audio/video content for governmental, educational, NGO and religious institutions. He as additional experience as a speaker, graphic designer, and institutional journalist. He holds degrees in Electromechanical Engineering from the Technological Institute of Tapachula (ITT), and Communication and Media from the University of Montemorelos (UM). Rabi was born in Chiapas in the small tropical town of Tuxtla Chico. He enjoys nature, piano, singing, and believes in collective development.

Fátima Luna
Project Manager - Environmental and Natural Resource Economist
520-290-0828 ext 1115

Fátima joined the Sonoran Institute in 2013 and serves as the Environmental and Natural Resource Economist for the Colorado River Delta Program. Fatima’s role in the program is to make a socioeconomic argument for Delta conservation. Fátima has experience conducting Benefit Costs Analysis, ecosystem valuation methods and economic impact of environmental, social, and cultural benefits of restoration efforts. She received a B.A. in Environmental Economics and Policy from the University of California Berkeley and a M.S. in Agriculture Resource Economics from the University of Arizona. Born and raised in a small rural farming community in Mexico, Fátima understands the value of rivers, wildlife, and culture. She has traveled throughout Mexico. Today, she enjoys home gardening with her husband and three children in South Tucson, AZ.

Corinne Matesich
Marketing Communications Manager
520-290-0828 ext 1105

Corinne began as the Marketing Communications Coordinator in 2017. She works to highlight the mission and vision of the Sonoran Institute, and raise awareness of the projects and programs that improve Western lands, rivers and communities. She helps to develop campaigns, print materials, e-newsletters, and maintains the web and social media. Prior to joining the Sonoran Institute, Corinne was a graphic designer at the Arizona-Sonora Desert Museum where she worked with marketing and development staff as well as exhibits. She has also worked for the San Francisco Arts Commission funding artists and non-profits. She holds a B.A. in Art History and Arts Management from the University of San Francisco. She spends free time enjoying the arts and nature. As a native Tucsonan she seeks to spend time in the desert and mountains whenever possible—especially if the creeks are flowing. 

Angela Melendez
GIS Coordinator
+52 686-582-54-31

Angela is the Geographic Information Systems coordinator. She joined the Sonoran Institute in 2016, as a Program Associate in Phoenix, and moved to Mexicali in 2018 to continue her work with a GIS focus. She works in the integration, analysis, presentation and management of spatial information generated in the organization, with an emphasis on the ongoing projects in the Water and Ecosystem Restoration Team, as well as also collaborating closely with the Sustainable Landscapes and Communities team. Angela was born in Los Angeles and lived in Mexicali for much of her life, where she received her bachelor’s degree in Architecture and her master’s in Sustainable Planning and Development, from the Autonomous University of Baja California. Outside of work she loves music, painting, and advocating for social and environmental justice.

Sandra Ortiz
Ecological Restoration Coordinator

Sandra is the Ecological Restoration Coordinator. She is responsible for implementing the restoration projects for the Colorado River Delta Legacy Program. She joined the Sonoran Institute Mexico A.C. team at the end of 2016 and previously worked on restoration projects of mangrove and floodplain forest in Veracruz, México. She is a Renewable Natural Resources Engineer, from Universidad Autónoma de Chapingo and has a Masters in Integral Environmental Administration from El Colegio de la Frontera Norte.

Carla Cristina Perea
Urban Projects Department Assistant

Cristina Perea has worked as the Urban Projects Department assistant since 2016. She holds an International Relations degree from the Social and Political Sciences Faculty of the Autonomous University of Baja California (UABC) and a master’s degree in Planning and Sustainable Development at the same institution. She is part of a contemporary dance group and she is also dedicated to teaching dance classes to young people.

Alfredo Ramos Tolento
Restoration Assistant
Tomás Rivas Salcedo
Estuarine Restoration Specialist

Tomás Rivas Salcedo is the Estuarine Restoration Specialist for the Colorado River Delta Legacy Program and has been working in the program since 2012. Tomás is responsible for the implementation of vegetation, fauna and water quality monitoring in the Colorado River Delta and estuary area. He graduated in 1999 with a B.S. in Marine Biology from Autonomous University of Campeche with emphasis in ecology, and has implemented coastal zooplankton and water quality monitoring in the Gulf of Mexico. He has experience in managing conservation and restoration projects in Southeastern Mexico and training in estuarine and coastal ecosystems restoration and management. He also has experience in wildlife monitoring, especially insects (bees, wasps and their nests), phylogenetic analysis, taxonomy and systematics.

Ana Carolina Romero Jiménez
Administration and Finance Assistant
+52-686-582-54-31 Ext. 101

Ana Carolina joined the Sonoran Institute in 2017 as an Administration and Finance Assistant. She coordinates various administrative, financial and accounting processes and assists with human resources for the organization. She graduated as a Public Accountant from the Autonomous University of Baja California in Mexicali. Carolina enjoys spending time with her family, likes to organize events and work on craft projects.

Brandon Ruiz
Program Associate
602-393-4310 ext.323

Brandon began at the Sonoran Institute in 2016 as a Program Associate working under the Resilient Communities and Watersheds program—a joint partnership with the Lincoln Institute of Land Policy. Brandon is involved with program initiatives in the areas of water, resilient communities and exploratory scenario planning, working with a variety of stakeholders from city planners and academics, to local residents and organizations. He earned a Bachelor’s of Science in Sustainability and a Bachelor’s of Science in Urban Planning from Arizona State University, and will be pursuing a master’s degree in Urban and Environmental Planning. His main points of interest are in energy, community development and the interconnections between the natural and built environment. He has had the opportunity to be involved with local schools, businesses, and student organizations in a range of community engagement and leadership positions. Outside the office he enjoys exploring new places in between the calm of mountains and trees.

Edith Santiago Serrano
Associate Director - Colorado River Delta Program

Edith Santiago is the Associate Director for the Colorado River Delta Legacy Program and has been working in the Program since 2005. Edith is responsible for overseeing the operation of the field office in Mexicali, including the administration and implementation of projects. She supports the Program in establishing work plans, identifying funding needs with foundations and private donors. She has experience managing conservation and restoration projects in Mexico and training in estuarine and coastal ecosystems restoration and management. Edith speaks Spanish and English and some French. She holds a master’s degree in Integrated Environmental Studies from the University of Southampton in the United Kingdom and studied Oceanology at the University of Baja California in Ensenada Baja California with emphasis in water quality.

Karen Schlatter
Associate Director - Colorado River Delta Program
520-290-0828 ext 1112

Karen is the Associate Director for the Colorado River Delta Program and has been working in the Delta Program since 2010. Karen manages the ecological monitoring program, guides adaptive management of restoration sites, and provides program support in communications and fundraising. She is a co-manager of the Minute 319 binational monitoring team and specializes in vegetation monitoring and riparian restoration ecology. Karen has led research initiatives on wetland restoration success criteria in California and adaptive management of restoration treatments and environmental flows in the Delta. She enjoys working at the nexus of ecological restoration, policy, natural resource management, and social values. Karen has an M.S. in Environmental Studies from the University of Colorado Boulder and a B.S. in Biology from McGill University, Montreal. She previously served as a Peace Corps volunteer in Paraguay and is fluent in Spanish and Guaraní.

John Shepard
Senior Director of Programs
520-290-0828 ext 1108

John Shepard is the Senior Director of Programs at the Sonoran Institute, responsible for ensuring that the organization’s programs align with the mission and vision of the organization. John oversees all programs and works with staff in program planning, implementation, and evaluation. He also is responsible for new program development and assists with fundraising at the organizational and program level. John has launched the Institute’s renewable energy program, as well as training programs on community land-use planning for rural western county commissioners, integrating conservation into master-planned communities for developers, and partnership building for public land managers and gateway communities. He also established Building from the Best of Tucson, a project that promotes development consistent with Tucson’s building traditions and appropriate for a desert community. Before joining the Institute, John worked for seven years in resource development at The Wilderness Society and for five years conducting a series of investigative reports on federal health and safety programs for a consumer advocacy organization.

Amanda Smith
Program Associate
520-290-0828 ext 1144

Amanda Smith is a Program Associate working on the Santa Cruz River Initiative within the Sun Corridor Program. She joined the Sonoran Institute in 2017. She is excited to support the power of collaborative partnerships necessary for protecting open landscapes and planning smart cities that foster a high quality of living. Having been raised in Wisconsin, living all over the United States, and now a resident of Arizona since 2012–she knows the common ground between urban and agrarian lifestyles. Her background includes several years of wildlife research and environmental stewardship projects, combined with a master’s degree in Urban Planning and a certificate in water policy. She likes to spend time in the wilder parts in and around Tucson, artistic adventures, and rock climbing.

Jeremy Stapleton
Director of Climate Resilience
602-393-4310 ext 316

Jeremy joined the Sonoran Institute in 2016. He is the Director of Climate Resilience, and works with the Resilient Communities and Watersheds, a joint program between the Sonoran Institute and the Lincoln Institute of Land Policy. The program addresses a fundamental lack of integration between land use planning and water management in the western United States. Jeremy’s work aims to reconnect neighbors and nature and help people live lighter on the land and each other. His philosophy and strategies are inspired by over a decade in the fields of urban design, planning and landscape architecture and as a backcountry guide in Grand Canyon and throughout the world. He is currently Chair of the Environmental Quality Commission for the City of Phoenix and spends any remaining free time in his garden or wandering off into the wild to recharge with his family

Grace Wofford
Marketing Communications Intern

Grace joined the Sonoran Institute in 2018 as our Marketing Communications Intern. Grace assists with our social networks and community outreach efforts to spread awareness of our most current initiatives and goals. As a sociology student at the University of Arizona, Grace has always had a passion for sustainability and for understanding the vital role sustainable action plays in our communities. She is currently working on an independent three-part study with the University of Arizona to explore the underlying psychological and social components that motivate pro-environmental behavior, green product purchase, and green policies. In her free time, Grace enjoys hiking, finding new music, and thrift shopping. Grace hopes to use her interdisciplinary background and independent research efforts to find new and effective ways to communicate green behavior and motivate long-term sustainable change.

Ryan VanDero
Manager - Human Resources and Accounting
520-290-0828 ext 1128

A native of New Jersey, Ryan always dreamed of moving west.  That dream was realized in the fall of 2004 when he left behind all that he knew and took a (permanent) cross country road trip to Tucson, AZ.  Having spent his life until then in the lush northeast, the southwest was a bit different than he expected.  However, he quickly came to appreciate the natural beauty, great climate, and diverse wildlife of the Sonoran desert.  Ryan landed at Sonoran Institute in the spring of 2012 and has been a part of the team since.  Ryan provides human resources and finance support to our team and enjoys knowing his support helps keep the west an extraordinary place to live, one program at a time.

Francisco Zamora
Director - Colorado River Delta Program
520-290-0828 ext 1137

Francisco Zamora Arroyo joined the Sonoran Institute in April 2002 to manage activities in the Delta of the Colorado River. Dr. Zamora has more than fourteen years experience working in the Delta as a researcher and project manager. As the Director of the Colorado River Delta program, he is responsible for integrating community stewardship, applied science, and local values in an alliance to reform water policy, conserve and restore priority areas, and build knowledge and capacity for collaboration between water managers and local leaders. Over the past fourteen years Dr. Zamora has developed close relationships with Mexican and U.S. agencies involved in water and land management, and communicates frequently with regional or national officials dealing with issues in the Colorado River Delta. He spends a good portion of his time in the field working with communities, visiting potential restoration areas, and doing field research and restoration work. He obtained his Ph.D. in Resource Geography from Oregon State University in October 2002, with a minor in natural resource economics. He also holds a master’s degree in Marine Resource Management from Oregon State University and a BS degree in Oceanography from Autonomous University of Baja California. He has published his work on ecological restoration, policy, and bi-national collaboration issues in the Delta.

Claire Zugmeyer
520-290-0828 ext 1143

Claire Zugmeyer is an Ecologist leading the Santa Cruz River Initiative within the Sun Corridor Program. Joining Sonoran Institute in 2007, she has led a variety of efforts including monitoring vegetation and fish along the river, production of the Living River series that summarizes the river health, and organization of the annual Research Days, an event promoting collaboration and awareness of regional research and conservation efforts. She completed a Masters in Wildlife and Fisheries Biology at the University of Arizona, a B.S. in Ecology, Behavior, and Evolution at the University of California, Los Angeles, and has worked on a variety of research and management projects focusing on birds, mammals, fish and amphibians, including Arizona’s endangered Mt. Graham red squirrel.

Looking to leave a legacy? Want to work with smart, passionate people? We’d love to chat with you. Browse the open positions we have on our team and don’t hesitate to reach out with any questions. We look forward to hearing from you!

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