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Meet the Staff

Office phone number - 215-646-8866

Gail Farmer
Executive Director

Gail Farmer joined WVWA as Executive Director in November 2016. Gail has spent the last ten years in leadership positions at environmental nonprofits, most recently serving as Director of Education at the Schuylkill Center for Environmental Education. Her family lives in the Wissahickon watershed, frequently enjoying the Green Ribbon Trail in Flourtown. She enjoys birding, hiking, and exploring parts of the watershed with her husband and two sons.

Sara Hertz
Interim Director of Development

Sara grew up in Philadelphia but lived in New York City, Washington, DC and England before settling in the Wissahickon Valley in 2002. She has 30 years of experience raising funds for a range of non-profits, with a focus on global conservation organizations. She is excited to be working with everyone at the Watershed to secure new resources for the team's great work. In her spare time, she is an elected member of Ambler Borough Council and was a co-founder and continued passionate supporter of the Ambler Farmers' Market. Sara and her two dogs and human family members all enjoy the Green Ribbon Trail system every day. 

John Ferro
Director of Conservation Resources

John has been with WVWA since 2008 in our Stewardship Department.  Growing up close to the Wissahickon and spending childhood days around the creek, the creek has always been a part of his life.  John came to WVWA with a degree in Environmental Science from Drexel University and is now pursuing a Master’s degree from Temple University.   John does the daily maintenance of the properties while focusing on the larger property management goals for all of WVWA lands.

Michaelle Fleisher
Director of Finance & Human Resources

Michaelle joined WVWA in July 2016. From her career start in public accounting to multiple progressions in the telecommunications industry, she has led finance, human resources and operations teams.  Throughout all of these assignments, Michaelle has been passionate about mentoring, leading women’s groups and college intern programs.  She loves to volunteer in her community and supports many organizations, she is currently in her 15th year on the Board of Managers at the Ambler Area YMCA. Michaelle and her husband have raised their two sons in the Wissahickon Valley, you are likely to see them around at events in the area. Their dog, Nellie, is a familiar tail wag at the Watershed, she has her own spot at work and acts as ambassador to any who enter our doors.

Jenn Bilger
Director of Engagement

Jenn joined WVWA in May of 2017 as Conservation Programs Manager. She is extremely excited to work with the land stewardship and water quality teams, assist in developing and managing various education and outreach programs, and cultivate partnerships and grant opportunities in this exciting new era for the Watershed! She has a Bachelor’s in International Studies, with a concentration in French and a minor in English, as well as a Masters in Environmental Education. She has worked in the environmental field for over 13 years at various centers, most recently as Summer Camp Director & Environmental Educator at Silver Lake Nature Center in Bristol, PA for the last 10 years. Jenn grew up in New Hampshire and currently lives in Newtown, PA with her husband David and young son Ryan. She has always loved being outside in nature and connecting people to their natural spaces, and she is thrilled to bring her passion and energy to WVWA. 

Gina Craigo
Senior Manager, Community Outreach

Gina joined WVWA in 2014. Born and raised in the Philadelphia area, with only a hiatus for her undergraduate years at the University of Pittsburgh, Gina now lives in Elkins Park with her husband and two young girls.  She has a Masters in Public Administration from Villanova University, and most recently spent seven years as Operations Manager with the Friends of High School Park in Elkins Park.  She’s excited to bring her diverse skills to a focused role with such a committed, professional team.

Lisa Hansell
Senior Manager, Development 

Lisa joined WVWA in 2003.  As Development Manager, Lisa is responsible for the stewardship of WVWA members and donors including management of the database. You will see Lisa welcoming attendees to most WVWA events at the registration table. Prior to working for WVWA, Lisa was a Corporate Trainer and Project Manager for Rosenbluth International.  Lisa has lived in Abington Township her entire life and resides in Roslyn, in the Sandy Run Watershed, with her husband, Todd, two daughters, and four cats.  She also volunteers for the Pennypack Farm & Education Center.

Kristy Morley

Kristy began volunteering for WVWA at the MAPS Bird Banding station in 2015, and later became the Conservation Resources Stewardship Intern in 2016. Largely a self-taught naturalist and avid birder, Kristy graduated from Delaware Valley University and completed her Pennsylvania Master Naturalist certification in 2016. She is currently working on completing her Designing With Natives Certification. Kristy is looking forward to developing and delivering programs that highlight the variety of habitats and inhabitants of the preserves WVWA manages.  


Lindsay Blanton
Water Quality Outreach Coordinator

Lindsay has always been fascinated by water, growing up next to the Delaware River. After graduating from University of Rochester in May 2013, she completed a year of service in AmeriCorps as a Watershed Ambassador with the NJDEP. As Outreach Coordinator, Lindsay conducts educational presentations to municipalities, community groups, students and the general public. She also works closely on the Wissahickon Clean Water Partnership, an initiative looking to develop a TMDL Alternative for the Wissahickon Watershed and collaborative approaches to improving water quality. Lindsay manages our Creek Watch volunteer program and loves connecting with volunteers and communities over shared passion for the Wissahickon Creek.


Madalyn Neff
Volunteer & Marketing Coordinator

Madalyn joined WVWA in 2014. As Volunteer & Marketing Coordinator, Madalyn is responsible for managing and engaging all WVWA's 500+ volunteers, leading WVWA's social media efforts (follow WVWA of Facebook, Twitter and Instagram!), and event publicity. Madalyn loves working with volunteers and connecting with the public to share the work that the organization is doing and create a greater awareness of what the Wissahickon Watershed has to offer. She is a graduate from Temple University's School of Media and Communication with a Bachelor's Degree in Public Relations and minors in both Sociology and Spanish.


Margaret Rohde
Stewardship Coordinator

Margaret is a native of Northern New Jersey, where she grew up spending her days outside, fishing, hiking, boating, and exploring the lakes and woods around her home. She graduated in 2012 from Washington College with a degree in Environmental Studies and since 2011, has worked on avian research projects throughout the north and southeast. As our Stewardship Coordinator, Margaret plans and implements habitat management on our preserves and leads bird, butterfly and plant monitoring activities to assess habitat quality and measure long-term impacts of our habitat management and restoration work.  She is a Certified Bird Bander, County Coordinator for Philadelphia County for the Bluebird Society of Pennsylvania, and serves on Wyncote Audubon's Board of Directors.


Rachel Rosenfeld
Administrative Assistant

Rachel began volunteering for WVWA as a Creek Watcher in 2014 and later became a Data and Trend Analyzer. She is also certified as a Master Watershed Steward through Penn State Cooperative Extension. She was born and raised in Montgomeryville, the headwaters of the Wissahickon Watershed. She graduated from the University of Delaware with a degree in Wildlife Conservation and a minor in French in May 2012. Prior to joining WVWA, Rachel worked as the Water Quality Program Assistant for Lower Merion Conservancy in Gladwyne.  She is passionate about championing environmental causes related to water, wildlife and habitat conservation. In her spare time, Rachel enjoys nature photography, hiking, kayaking, yoga and baking. 


Suzanne Smith-Oscilowski
Environmental Educator

Suzanne has worked for WVWA since 2011 and currently oversees education programs. She is responsible for ongoing programs as well as the development of new programs for students from early elementary through college as well as adult community programs.  Born in Philadelphia but having lived in other areas of the United States, Suzanne has several undergraduate and graduate degrees as well as a Pennsylvania teaching certification.  Suzanne enjoys gardening, running, cycling and is passionate about environmental issues.


Dennis Pennington
Water Quality Specialist

Dennis has more than 41 years of experience in hazardous waste and ground water investigations and watershed studies. He has been president of two major environmental professional organizations and has written over 24 professional articles. In 2008 Dennis was the recipient of the Ben Parker Memorial Medal by the American Institute of Professional Geologists, their highest award for lifetime achievement in the field of geology. In addition to his B.A. degree, he has an M.S. degree in aqueous geochemistry from Penn State University.  Since 2003, he has been the Water Resources Monitor for the WVWA. While at WVWA he developed a creek watch program in 2012. He also helps conduct educational programs at schools and environmental camps.


David Froehlich
Head Miller

Following two years as a city planner/Peace Corps Volunteer in Shiraz, Iran, David joined the staff of the Bucks County Planning Commission. There, as Chief of County Wide Planning he oversaw the preparation of the County’s first Natural Resources and Parks Plans. In 1976 he became the WVWA’s Executive Director and served in that capacity until 2006. He continues as a part-time Association employee as Miller at WVWA’s Evans/Mumbower Mill. He is also involved in the remediation of the Wissahickon Waterfowl Preserve outside of Ambler. 


Scott Berman
Open Space and Trails Assistant

Scott joined WVWA in February 2016. As the Open Space and Trails Assistant he will be prioritizing open space for protection and develop trail connection plans that aim to connect every community in the Watershed with trails and open space.  He is a native of the Wissahickon watershed having grown up in Lower Gwynedd. Scott graduated from American University with a Bachelor's Degree in History. He also studied environmental policy, and served as president of American's student environmental club in Spring 2012. Scott enjoys the outdoors, gardening, and is an enthusiastic supporter of the Ambler Farmer's Market.