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Dr. Chad Winterfeldt is Cantor of Christ Chapel where he oversees music in the chapel, teaches music theory and church music, directs the handbell ensembles, and maintains an active organ studio. He has received the Swenson-Bunn Memorial Award for Teaching Excellence, a recognition by which nominations and selections are administered wholly by Gustavus students. Chad holds degrees from the University of Nebraska, Yale University, and Concordia College, Moorhead. A frequent recitalist, he has performed internationally for the Early Music Festival in Wittenberg, Germany, and in solo performances in Leipzig (Thomaskirche) and Naumburg (Wenzelskirche), Germany. Other notable recitals include complete performances of Messiaen’s La Nativité and Bach’s Leipzig Chorales. He collaborates often with the choirs, bands, and orchestras at Gustavus and enjoys liturgical playing for worship services. An active church musician, he is Director of Music at Grace University Lutheran Church in Minneapolis.

Kate Aguilar is an active part of the History Department (assistant professor of African American and Sport History); Gender, Women, and Sexuality Studies; African/African Diaspora Studies; and Sport Management. She challenges students to consider not only what Black history is, but what it does in the world. Her public scholarship includes contributions to the Washington Post and TIME magazine, and she is the Film, Media, and Museum Reviews section editor for the Journal of Sport History. Her current book expands an understanding of the revolt of the black athlete into the 1980s. She is also a part of a broader community of scholars working on campus to learn more about, implement, and assess inclusive teaching pedagogies. 

Chris Nolting has been a Visiting Assistant Professor of Physics at Gustavus since 2023. In his classes, he focuses on including many worked example problems and opportunities for hands on learning in groups, and as many physics demonstrations as possible. As a computational astrophysicist, he enjoys showcasing examples related to astronomy whenever possible. His research focuses on the study of galaxy cluster environments and powerful jets from active galactic nuclei, supermassive black holes at the centers of galaxies that accrete matter and power some of the brightest objects in the universe. This work is mainly done through numerical simulations on compute clusters and supercomputers using up to tens of thousands of processors simultaneously. Gustavus students working on research with Chris learn coding languages and data visualization techniques, and even 3D print some of the structures they simulate.

Chris is the faculty advisor to the Society of Physics Students and the Gustavus Engineering Club.

Outside of Gustavus, Chris a self-identifying nerd. He is a lover of board games, magic the gathering, Marvel movies, anime, and going on walks with his dog.
 

Since 2003, Kiki Harbitz has taught courses in the department of Biology, as well as the department of Health and Exercise Science. She specializes in anatomy and physiology, evolutionary biology, and animal behavior. She enjoys teaching students about their own bodies and helping them build upon the skills necessary to advocate for themselves and others in medical settings and situations. She spends her free time with family and friends, with pets (and foster dogs), gardening/landscaping, making art, being active, storm chasing, doing photography, and enjoying nature.

Ernest Briggs is a professor of Theater and teaching Performance 1 and Performance 2, Improv, Directing and World Theater Analysis. He has recently directed The Secret in the Wings, Transforming and previously directed The Last Days of Judas Iscariot at Gustavus. Briggs has been a Warner Bros Discovery Early Access Early Career Bootcamp Fellow, Guthrie Theater Theater Management Fellow, and Park Square Directing Fellow. 

Ernest Briggs has been an actor, director, producer and teaching artist for more than 15 years. He has been seen on the stages at Guthrie Theater, Mixed Blood Theatre, Park Square Theater, South Coast Repertory, Pangea World Theatre, Children's Theatre and in films such as Unholy Communion, Ode for Leviticus, and Sold Out. 

Dr. Tiffany Grobelski is a human geographer who works at the intersection of energy geography and peace studies. Her research (and much of her teaching) is focused on energy conflicts, social movement-led energy transition, and how grassroots movements build positive peace. Tiffany earned her PhD in Geography and a graduate certificate in Socio-Legal Studies from the University of Washington, Seattle. Her doctoral research examined how Polish environmental advocates mobilize administrative law. Immediately after graduate school, Dr. Grobelski served as an asylum officer for the U.S. Department of Homeland Security. In that role, she adjudicated hundreds of humanitarian protection claims and gained extensive experience in non-adversarial, trauma-informed interviewing. 

She has since received training in Conflict Management and Mediation from the Institute of Peace and Conflict Studies at Conrad Grebel University College in Ontario, Canada. Dr. Grobelski's recent projects focus on energy conflicts in Minnesota. She is actively involved in the Peace & Justice Studies Association, as well as the Energy & Environment Specialty Group of the American Association of Geographers.

Dr. Grobelski is passionate about creative, effective teaching and sharing best practices with colleagues. She and geographer colleagues have received national attention for their approach to designing world geography classes. Dr. Grobelski has also convened a Working Group on Teaching Energy Geographies, which has international membership; the group aims to create a durable space for energy geography educators to build community and collective expertise.

Selected Publications:

• "Pipelines and Peacebuilding: Conflicting Sovereignties and Environmental Knowledge Creation along Line 3." In Handbook of Environmental Conflicts. Edward Elgar Publishing. (2026)
• “Changing the Coal Status Quo through Scalar Practices: The Anti-Smog Movement’s Contributions to Polish Energy Transition.” Environment and Planning C: Politics and Space 43 (7): 1369–90. (2025)
• (with Anna Versluis, and Jesse McClelland) “Discovering Geography through Doing Geography: Project-Based Learning in an Introductory Undergraduate World Geography Course.” Journal of Geography 122 (2): 31–42. (2023)

Lisa Ortmann, PhD is the Grace and Bertil Pehrson Endowed Professor and Associate Professor of Education at Gustavus. Dr. Ortmann’s education courses prepare future teachers across the grade levels and content areas to build a deep understanding of how children and adolescents learn to read and write, and the research-based methods of teaching literacy for all students. She was awarded the Innovation in Teaching Award from the Kendall Center for Engaged Learning for her “Literacy Histories” project, where education majors critically examine their own experiences of learning to read, write, and use language, identifying the ways their history shapes their teaching. She teaches a First Term Seminar course called “For the Love of Books!” where first-year students follow their curiosity as readers, reflecting on the value of literacy in their lives as citizens of a free and democratic society. Together, students build a reading community that sustains their values, shapes their identities, and expands their worldviews.

Dr. Ortmann’s scholarly work informs, and is informed by, her teaching and professional activities at the College and in the state. Her research areas include teachers’ uses of culturally responsive teaching practices and diverse literature, the instructional methods that support literacies of multilingual adolescent learners, and the impact of instructional coaching models to enhance teaching. Recent peer-reviewed publications include a co-authored study with a former Gustie student, “Developing Responsive Disciplinary Literacies for Student Teaching in Social Studies” in The Journal of Adolescent and Adult Literacy, and a state-wide study, "Surveying the Landscape: Minnesota's English Language Arts Teachers' Perspectives on Intellectual Freedom" in The Minnesota English Journal.

Dr. Ortmann’s professional service is in partnership with teachers and schools both locally and nationally. She is an engaged collaborator with Saint Peter and Mankato educators to design and facilitate real-world teaching opportunities for Gustie education majors at all stages of the four-year program. She serves the state of Minnesota as the Intellectual Freedom Chair for the board of the Minnesota Council of Teachers of English where she provides professional development to English Language Arts teachers across the state. She was selected to serve as a This Story Matters Teacher Corp Member on the National Council of Teachers of English to develop book rationales for teaching diverse literature. She consults and provides guidance on statewide reading initiatives for the Minnesota Association of Colleges of Teacher Education, and for the English Language Arts 2020 Standards development project with the Minnesota Department of Education.

In her moments of free time, you can find Dr. Ortmann outdoors at the lake or in her garden, reading a novel, running with her yellow lab Harley, or cheering loudly at her daughter’s performances and games. She is a passionate educator, who has found a home at Gustavus due to the life-long relationships that are built on campus. Mentoring new teachers into the profession is one of the greatest gifts of her career, especially when they return to campus with their own students.

John C. Volin, PhD serves as the 18th President of Gustavus. 

Following a postdoctoral fellowship in plant physiological ecology at the University of Wisconsin-Madison, Volin accepted a faculty position at Florida Atlantic University, where he rose to the rank of full professor in the Department of Biological Sciences and served as the director of the Environmental Sciences graduate program. Volin joined the University of Connecticut in 2007 to head the Department of Natural Resources and the Environment, advancing to serve as Vice Provost of Academic Affairs. From 2020-2025, Volin served as the Executive Vice President for Academic Affairs and Provost at the University of Maine, where his portfolio included oversight of more than 1,000 faculty and staff and a budget of over $250 million. Volin is recognized as a national leader in using evidence-based practices to support holistic student wellbeing. He serves on the Executive Committee of the LearningWell Coalition and is a co-founder and senior advisor of LearningWell magazine.

Born and raised in Sioux Falls, South Dakota, Volin holds a BS in botany and biology and an MS in agronomy from the South Dakota State University, and a PhD in forestry from the University of Wisconsin-Madison. Volin and his wife, Valeria, have five children and six grandchildren.

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Dr. Laura D. Triplett began her Gustavus career in 2008 with a faculty appointment in geology. Now established in the department of Environment, Geography and Earth Sciences, she teaches courses related to earth surface processes, environmental geochemistry, hydrogeology and climate change. She has authored multiple peer-reviewed publications on topics as varied as reconstructing past water quality conditions in lakes and rivers, quantifying impacts of invasive species on freshwater geochemical cycling, and creating state-wide landslide susceptibility maps. In all her research, Dr. Triplett seeks out collaborations with community stakeholders. And, Dr. Triplett has involved Gustavus students in almost all aspects of her research program from designing preliminary studies, to executing major multi-year projects funded by external foundations and government agencies, to presenting findings at national scientific conferences.

Jon Grinnell is the Francis Morey Uhler Chair in Biology. He spent his youth roaming the hills of coastal California watching the hawks and admiring alligator lizards and rattlesnakes. From the time of his first borrowed binoculars he has been fascinated with wild creatures and places, and now is excited to share those with students. 

As an undergraduate he worked with the last wild California Condors before they were taken into captive breeding programs, and as a graduate student he studied the social and communication behavior of African lions in Tanzania. For years, he worked on lions in South Africa before transitioning to American bison in South Dakota. In each of these projects he eagerly involved research students, as one of his great loves is taking students out into the field to get hands-on experience with animals and ecosystems. 

Recently his attention has shifted to the plight of shallow marine habitats and regularly takes students to study the Mesoamerican coral reef in Belize. Jon feels privileged to have the chance to teach animal behavior, aquatic biology, vertebrate zoology, and other field-based courses at Gustavus, as well as the many travel courses he has led throughout South and Central America and the Caribbean.

Jon is an avid cyclist, scuba diver, hiker, animal watcher, and bow hunter. 

For more than twenty years, Christine Nessler worked as a marketing and public relations professional across government, nonprofit, and for-profit sectors. As a former entrepreneur and franchise owner, she has experience building brands from the ground up and maintaining a strong community presence. Beyond the business world, creative writing is her primary passion. As a freelance writer, she contributed articles to various regional publications. Her short stories and essays are featured in Half and One online literary journal and The Motherly Collective.

In 2024, Nessler joined the faculty at Gustavus. Students in her courses gain hands-on experience and the practical skills necessary to thrive in the workplace by applying classroom concepts to real-world community and business projects. In Nessler’s marketing courses, her favorite part of the semester is watching the students gain confidence as they serve as consultants for local business clients. As they develop strategic marketing plans, students also develop communication, project management, and leadership skills. Similarly, in Introduction to Management, her students build their own business from the ground up. According to Nessler, watching their final business plan presentations makes her optimistic about their futures as business and community leaders.

Outside of the classroom, Nessler serves on the Board of Directors for the Harry Meyering Center, volunteers as a reader of creative nonfiction for The Good Life Review, and cheers on her three kids at their various activities.

Espen Fredrick is a Visiting Assistant Professor of Physics. A 2021 Gustavus alumnus, Dr. Fredrick earned his Ph.D. in Physics from the University of Texas at Arlington in 2025 before returning to the college, bringing with him a strong commitment to undergraduate education and student-centered research.

In the classroom, Dr. Fredrick emphasizes preparing students for future careers in science and related fields through a teaching philosophy centering on helping students develop the habits needed for independent problem solving. His favorite courses to teach include electromagnetic theory and quantum mechanics, where he enjoys helping students contextualize new mathematical formalisms to build their own physical intuition.

Dr. Fredrick’s research focuses on space plasma physics, particularly the interaction between the solar wind and Earth’s magnetic field. His work aims to improve predictions of how and when solar wind disturbances impact near-Earth space, contributing to a broader understanding of space weather and its effects on technological systems. At Gustavus, he is interested in involving undergraduates in research that emphasizes the accessibility of computational physics and empowers students to conduct meaningful research beyond traditional settings.

Beyond teaching and research, Dr. Fredrick currently assists students who operate the Olin Observatory, helping them gain hands-on experience with astronomical instrumentation. He values close collaboration with students and sees mentoring as one of the most rewarding aspects of his role. He is excited to help students grow as scientists, problem solvers, and future leaders.