Bachelor of Science in Environmental Science


The environmental science major at Saint Joseph’s prepares students to be stewards of the planet through investigation of the environment and the ecological challenges it faces.

The environmental science degrees integrate a range of scientific disciplines, including biology, chemistry, and geology, around the study of the environment. An important focus of Saint Joseph’s environmental program is on aquatic ecosystems such as Sebago Lake and the nearby Gulf of Maine.

At a Glance

  • Ideal location for field exercises and research opportunities. Situated on the shores of Sebago Lake, Saint Joseph’s surrounding region features lakes, mountains, forests, and the Atlantic Ocean.
  • Low student-faculty ratios ensure close interaction with professors.
  • Student involvement in research that prepares students for careers and graduate school.
  • Courses provide broad training needed for a career in science.
  • Numerous specialty courses to pursue individual interests.
  • Opportunity to enroll in the Environmental Science Semester, a semester-long, field-based education experience.
Request Info
Apply Now


The Bachelor of Science in Environmental Science incorporates the principles of biology, chemistry, calculus, ecology, and more. Much of the curriculum is field-based, with opportunities to earn credits through completely off-campus, immersive study. Also available is a Bachelor of Arts in Environmental Studies, which has a similarly science-heavy curriculum, though requires two semesters of foreign language study.

Environmental Science Minor

minor in environmental science is available and requires students to take 20 credits.

Sustainability Studies Minor

minor in Sustainability Studies is available and requires students to take 20 credits of course work.


Mark Green
Mark GreenProfessor
PhD, SUNY at Stony Brook
MS, SUNY at Stony Brook
BS, Allegheny College
Greg Teegarden
Greg TeegardenProfessor
PhD, University of Rhode Island
MS, University of Maine
BA, University of Colorado
Johan Erikson
Johan EriksonProfessor
PhD, Dartmouth College
MS, Stanford University
AB, Dartmouth College


Shaylee Davis ’21 Environmental Science + Marine Science

Shaylee Davis ’21

“I’m seeking to determine if the amount of phosphorus in a local lake is detrimental to the natural ecosystem. I’m working with Dr. Lesher and a consultant, Maggie Mills of FB Environmental, to conduct lake sediment chemistry experiments for the Long Pond Association.”

Environmental Science student Caleb Gravel

Caleb Gravel ’19

 “I’m passionate about making a spot, a safe space to conserve a species. I want to pursue conservation biology and help provide species with safe living spaces. I want to ensure that species are not going extinct.”

Read the Bee Pollinator story

Haley Batchelder ’19

Haley Batchelder has been conducting field research on sediment chemistry aboard the Portland Water District’s pontoon boat on Sebago Lake. Watch the video as she talks about the project.


Join Tyler Allen ’18 on his Lake Water Quality Research

“I want to be that guy that goes out and takes water samples. I don’t want to be sitting at a desk all day. I just can’t do that. If I could go out on a boat and take water samples and monitor the lakes, then that would be a dream come true.”


Students who major in environmental science will be qualified for professional careers in government (e.g. EPA, DEP), environmental consulting, and conservation.



Environmental Science Semester (ESS) – students spend the semester immersed in science, traveling from Nova Scotia to the White Mountains to the coast of Maine.

Students blog about their adventures

Life during ESS

  • Life on the Islands of Maine

    October 15th, 2018

    Following our second stay in Wells, we returned to Portland before catching the ferry for a week on Peaks Island in Casco Bay. Once on Peaks, we observed the changes in wave energy affecting the island around its perimeter.

  • Zonation in the Salt Marsh

    October 4th, 2018

    Before heading back to the Wells National Estuarine Research Reserve, the gang stopped at Thompson’s Orchard for some fall festivities – apple picking and donut eating. In Wells, the salt marsh was another strong example of zonation that we’ve seen throughout our learning.

  • Creatures and Waves at the Rocky Intertidal Zone

    September 25th, 2018

    After our first adventure on a research boat studying the Damariscotta River estuary, where we observed how the salinity and mixing state of the estuary affects the diversity of zooplankton and phytoplankton population, we moved on to Rocky Intertidal Zones. We went to Ocean Point at Linekin Neck in Boothbay Harbor, Maine.

  • Damariscotta Estuary

    September 25th, 2018

    After an early morning wake up, we set off to experience the main attraction the Darling Marine Center had to offer, the Damariscotta River estuary. Heading down to the boat, it had already started off rough; rainy and cloudy, but it was all worth it in the end.

Read More