of Chester County, PA


We are our volunteers - join us!

Contact Info


Mary Ciarrocchi (co-chair) - italiangrden@comcast.net
Leslie Siebert (co-chair) - siebertles@gmail.com

Active Members

Diane Maguire - maguire54@verizon.net
Robert Bruckman - dancingbob2@gmail.com
Jim Wylie - jim.wylie@verizon.net

Group Chairs

The Chester County Group Chairperson is currently shared between Mary Ciarrocchi and Leslie Siebert.

Mary Ciarrocchi

I am a ten-year resident of Chester County, presently living in West Goshen township and have been a member of the Sierra Club for about five years. The birth of the Chester County Sierra Club group two years ago provided the opportunity for me to find an outlet for my growing concern over the many threats to our beautiful area . I like to think of myself as being a realistic idealist, and my optimism is in no small part fueled by the energy, selflessness and determination manifested in the people involved in the environmental movement. The possibilities for our business, agriculture, tourism and land preservation future can be optimistic ones with the involvement of Chester County’s residents, and it is my hope that the Chester County Sierra Club group will be a vital component in these efforts.

My working life has ranged from being a small business owner to retail manager, to working in an old inn and I am presently employed by a global insurance company.

Other activities include volunteering for a computer training program for women with the Chester County YWCA , membership and volunteering at Tyler Arboretum and acting as president of the West Chester local chapter of Business and Professional Women’s Club, a national organization that advocates for issues affecting working women. Cooking with locally grown foods is a special plus to living here as is the chance to explore the beauty of our countryside.

Leslie Siebert

Leslie is a Chester County resident of 11 years, and lives on 13 acres of protected woodland in a rustic log house with her two rescued shepherd mixes, Kacy and Duke.

She has been with the Sierra Club in Chester County since its inception, and is especially interested in open space preservation, responsible utilization of natural resources, sustainability and health impacts, and educating consumers around "thinking globally, acting locally." She has been a Sierra Club member for over 25 years. In the late 80's she was a leader with Inner City Outings for several years, and went on her first Service Trip to do fence removal in Nevada in October, 2007. A life-long nature enthusiast, she hikes, bicycles, plays tennis and likes music and the arts.

She has a BA in Psychology, and a Master's in Social Work and has worked in various health care settings. She recently spent a year in Vermont earning a Master's in Environmental Law and Policy, and currently works as a consultant in environmental health.

Active Members and Committee Leaders

Diane Maguire

diane maguire photoDiane developed an appreciation for the outdoors as a child on family camping trips in the Poconos. She graduated from West Chester University with a B.S. in Biology and has worked as a biochemist for over 25 years. She supports various land preservation and watershed protection organizations, has participated in invasive plant removal efforts at the University and at her employer’s forest stewardship areaandwas formerly chairperson of the Unitarian Fellowship of West Chester’s Global Warming group. 

Jim Wylie

Jim Wylie photoJim is a committed environmentalist, concerned about the preservation of our natural resources for future generations. His largest concern is with the human contribution to global climate change and our reluctance to embrace carbon-neutral solutions.

When he has time, Jim can be found either on a river paddling a canoe or in his shop building one. His favorite routes are in Adirondack Park in northern New York, where he also enjoys cross country skiing with his wife and two college age kids.

Jim attended Bucknell University, recieving a BS in Electrical Engineering, going on to work for Unisys Corporation as a computer hardware and software developer for 28 years. In 2008 he realized that the world really didn't need any more big, fast computers, at least not as much as it needs renewable energy solutions. Jim left Unisys to retrain as a Sustainability Engineer, completing a Graduate Certificate program at UMass/Dartmouth in Sustainable Development. He currently works part-time jobs as a managing partner at Hybrid Cycles Electric Bikes and as a consultant at Practical Energy Solutions, both in West Chester. Jim has also participated in local energy efficiency and clean energy projects.

Jim's volunteer hours are spent trying to make a difference in the community by contributing to two organizations that share his concern for global climate change and environmental protection: West Chester Borough Leaders United for Emission Reduction (BLUER) and the Sierra Club of Chester County.