About Us


eGo CarShare was started by a group of Boulder citizens who were very concerned about minimizing their environmental impact, and who strived to leave a more sustainable legacy for future generations. They took the issue of transportation to heart and made a commitment to minimize their automobile use. In 1997, the “Little Red Car Co-op” was formed. The momentum continued forward, and in 1998, Boulder CarShare (BCS) was founded.

The organization was incorporated as a Colorado nonprofit on August 28, 1998. Approval by the IRS as a 501(c)(3) entity came on April 3, 2006. Boulder CarShare rebranded in January 2009 as eGo CarShare in order to bring its service to the city of Denver. In March of 2009 eGo CarShare placed its first three cars in Denver, and in the fall of 2009 eGo CarShare received its first significant outside funding from a CMAQ (Congestion Mitigation and Air Quality) grant to aid in its expansion to core Denver neighborhoods.

Since then we have been adding new locations through partnerships and another round of CMAQ funding, which has allowed us to start adding carshare vehicles in close proximity to B-cycle (Denver & Boulder’s bike sharing systems) stations to create multimodal hubs. These hubs allow members to “right size” their transportation. They can choose to walk, bicycle, B-cycle, jump on the bus or light rail, or grab a carshare car depending on their need.

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Core Staff

We couldn’t do what we do as a small community nonprofit without stellar staff members. Lucky us that we have found the best of the best to assist our members at all times of the day, keep our fleet running smooth, and lead our organization to the next level. Find out more about these hardworking folks!

Peter D. Krahenbuhl, CEO

Peter is a sustainability, business development and communications leader with years of experience working with the private sector, governmental and non-governmental organizations. As Co-founder and former President of Sustainable Travel International (STI), he helped develop and grow a start-up organization into a global industry leader with outreach in the millions. This includes developing several multi-industry firsts as one of the world’s leading experts in integrated bottom line standards and carbon management solutions, as well as leading sustainability solutions in travel and tourism. He has implemented and continues to advise regarding best practices solutions for small to global companies, communities and governments.   After working abroad for 8 years, Peter returned to Colorado, where he has been helping non-profits in the sustainability field with strategic partnerships, development and consulting. Most recently this includes working with world renowned sustainability pioneer, L. Hunter Lovins at Natural Capitalism Solutions as the organization's Head of Partnerships and Consulting. At the beginning of 2017 Peter accepted the role of CEO with eGo Carshare, where he currently utilizes his strategic planning, partnerships and development skills in the emerging field of multi-modal, sustainable and socially equitable mobility, in order to position the organization to succeed in a highly competitive market.   In his past life Peter worked in the adventure travel industry in all aspects of operations, sales, business and product development. His leadership experience extends to working on international community development and conservation projects, being a published author related to sustainability topics and travel, and as a recognized industry and public speaker.

Karen Worminghaus, Co-Founder & Operations Director

Karen has been eGo CarShare’s (formerly Boulder CarShare’s) tireless Executive Director since the program’s inception in 2001, and, not coincidentally, she has also been car-free for over 14 years. Karen grew up in the Midwest, but the Rocky Mountains lured her out to Colorado in 1997. Once she discovered she could easily and joyfully get nearly everywhere in Boulder by bike and bus, she was here to stay. What started out as a volunteer and “hobby” project for Karen has gradually transformed into a thriving, non-profit carsharing program – one of the first of its kind in the nation (as evidenced by our URL carshare.org). From 2001-2010, Karen volunteered her time as ED. During those early years for her “day job” she worked in the LOHAS industry, was the CFO of a local home health care agency, and the Conference Manager for Sustainable Resources (a Boulder NPO). Eventually, though, carsharing took over her life, and it’s not just a hobby anymore. She is passionate about helping to transform the way we think about transportation, and advocates for placing people, rather than cars, at the heart of community planning, so that we can create more sustainable, fulfilling and inspirational communities. Karen holds a BA in physics from DePauw University and a teaching certification from UW-Stevens Point.   Favorite Member Interaction: There are so many, it's hard to pick just one. All of our members rock! Any person who chooses to live car-lite or car-free inspires me. But here’s an example of how much our members look out for each other: a member left a personal credit card in one of our cars. The next member found it and left us a message about it. When we called her back later that day to arrange to get the credit card back to its rightful owner, she informed us that she had already taken it upon herself to find the credit card owner on Facebook, and she had already returned the card to him. I love it when people help each other out like that.

Sylvia Taylor – Member Services Manager

Our Member Services Manager, Sylvia Taylor, says she likes her job because she is passionate about environmental conservation, biking and having a car-lite lifestyle.  She was an active member of eGo CarShare for a year even before joining the office team in October 2016. She has done administrative work for various nonprofit organizations for several decades, and in college she studied ecology and education. She has three kids and a grandson and along with them she enjoys singing, yoga, hiking, environmental activism, volunteering with recovering addicts, and design. She says living a mile from her work place is a dream come true.

Will Shepherd – Marketing Manager

Will has been working in nonprofit marketing & media production since 2007 when he began supporting efforts for carsharing around San Francisco.  Being car-free inspired Will to embrace Bay Area cycling culture and begin advocating for others to reconsider their daily commuting patterns.  After moving to Boulder in 2015 he began helping eGo CarShare with community outreach and started working as Marketing Manager in 2016.   He also enjoys local music in Boulder, exploring new areas in Denver and adventuring around the Rocky Mountains.

Brian Crawford – Boulder Fleet Manager

Brian Crawford joined the eGo CarShare team in November of 2015. He previously worked for Real Good Solar Energy and brings with him a passion for sustainability. Brian is an avid bike rider and has been car-free for over 5 years. He enjoys getting outdoors, backpacking, and brewing beer.

Jim Chappell – Denver Fleet Manager

Jim came to Colorado in 2002 with his wife Betsy and his six children. The loves of his life are his family, studying history, automobiles- old and new, and going to the mountains at least once each month. Jim takes care of servicing the Denver vehicle fleet and occasional community outreach.  He has been a member since 2011 and believes strongly in the environmental mission of eGo CarShare.

Board of Directors

Staff could not propel eGo to the next level without the oversight and leadership of our dedicated Board of Directors. Please see below for any open Board Positions.

Zac Swank – President

Zac Swank has experience starting, running, and consulting with a wide variety of businesses. He is currently a business sustainability team lead at Boulder County’s Partners for a Clean Environment program, where he advises local businesses on environmental sustainability practices. Previously he was operations manager of the nonprofit carsharing organization, eGo CarShare, where he oversaw 25% growth in two years. Prior to that, he worked as a fellow at Natural Capitalism Solutions, where he helped a $1.8 billion restaurant chain establish its first sustainability program. Zac has also orchestrated the business plan, construction, and management training for a sustainable tourist lodge. He holds a master’s in business administration and a bachelor’s in environmental politics.

Daniel Ziskin – Vice President

Daniel Ziskin grew up in a car-dependent sprawling suburb of Philadelphia. In 1993 he received a Ph.D. in physics from The Johns Hopkins University by studying clouds and their effect on climate. After his ultimate frisbee career peaked, he became involved as a transportation activist fighting the construction of a wasteful outer beltway around Washington, D.C. In 1998, Daniel moved to Boulder. He donated his car to eGo CarShare and joined the board around 2001.

Bryan Snow – Treasurer

Bryan was elected to board of eGo CarShare in March of 2016 and currently serves as the Treasurer. He grew up in Boulder, and while currently living in Denver, his heart will always be near the Flatirons. He works as a financial analyst for SRS Acquiom; the leader in private M&A consulting, shareholder representation, payments administration and escrow solutions.   Previously he spent 17 years at Janus Capital in a variety of roles, from trading operations to trading to corporate finance.   He holds a B.S. in Business from the University of Colorado at Boulder and a MBS in Corporate Finance from the University of Colorado at Denver.

Holly White – Secretary

Holly has been an eGo Board Member since 2015 and has served as Secretary of the Board since March of 2016.  Holly is a long-time eGo member, joining the organization in 2010.  She lives in downtown Denver and has not owned a vehicle for six years.  Joining eGo CarShare gave Holly the confidence to sell her vehicle and never look back.  Holly enjoys serving on eGo’s Board because she values our mission of reducing the number of cars on the road and finding creative ways to encourage people to minimize or eliminate use of their personal vehicles. Holly is an attorney at Lewis Roca Rothgerber Christie LLP.

Cathy Bird

Originally from Ohio, Cathy fell in love with the freedom of transit at age 11. Stemming from days spent busing to her grandparents, biking on Indiana University's campus, and then guiding students through the Paris metro, Cathy grew into quite the transit geek. In fact, she and her husband searched for a first home in the hub of transit: they live at the intersection of two bus lines, can access four highway on-ramps, and can walk a half-block to a Light Rail station! Moving to Denver in 1991, Cathy taught French and Spanish to middle school students for more than a decade. Switching gears in 2014 brought her to the Citizens' Academy class at the Transit Alliance and an internship at the Alliance Center, all while volunteering at Transportation Solutions, Denver B-cycle, and Safe Routes to School Coalition. Finally in 2016, she was asked to serve on the board of eGo CarShare and became Outreach Coordinator for 36 Commuting Solutions in Louisville.

Chelsea Castellano

As a young professional embarking on a quest to make a positive impact on our community and environment, Chelsea couldn't be happier to serve on the eGo Board. Chelsea is passionate that multi-modal transportation should be accessible for all, and that providing such access not only improves our economy, our health, and planet, but also enriches our lives by fostering a strong sense of place where we work, live, and play. She currently works as the Sustainability Program Manager for UCAR|NCAR where her main role is to develop, implement, and advance organization-wide goals that aim to translate UCAR and NCAR's cutting edge science and research into operational practice.   Chelsea graduated from CU Boulder with a degree in Environmental Studies & Sustainability Development in 2012. When she's not biking or bussing to/from work, you're most likely to find her skiing, hiking, mountain biking, painting, volunteering, sharing a beer with friends, or planning her next travel adventure

Lissa Myers

Lissa Myers has over 15 years’ experience in the transportation planning field with a focus on advocating for, planning, designing and implementing alternative modes of transportation at the campus, local and regional level. Her areas of expertise include rail and bus transit services, bicycle and pedestrian facilities and alternative working strategies (telework and compressed work weeks) to promote sustainability and offer travel choices that improve the efficiency of and reduce impacts from transportation systems. Lissa has worked in the private, non-profit and public sectors managing various projects including preparing NEPA environmental studies for proposed infrastructure, designing and implementing alternative transportation facilities and programs for employers, and advocating on behalf of stakeholders for transportation improvements with regional, state and federal transportation decision makers. For the last seven years Lissa has been managing the design and implementation of sustainability strategies at the NREL Campus that maximize the benefits of the research conducted at the lab, improve resiliency and reduce environmental impact of doing business. Lissa holds a Bachelor of Environmental Design in Urban Planning from the University of Colorado at Boulder and a Master of Public Policy from the University of Denver.

Thomas Wells

Thomas has been an advocate of alternative transportation for many years - from riding his bike 20 miles round-trip through rural Missouri to visit the local pool in middle school (uphill both ways, of course) to opting to go car-free as a Freshman at Colorado School of Mines. He is currently an energy industry data scientist at Navigant Consulting in Boulder where he helps utility clients understand their energy efficiency and consumption. Thomas holds degrees in engineering physics and electrical engineering from CSM and previously worked in the oil fields of remote, northern Alaska for BP. He has been a member of eGo CarShare since moving to Boulder in 2013 and joined the board of directors in early 2016. Outside of work, you can find Thomas climbing rocks, running trails, and volunteering his time with boards and civic groups involved in various facets of the energy-transportation-housing-social justice nexus.

Board Positions Available!

If you are a leader in the greater Boulder Denver-metro region who may be interested in helping an amazing nonprofit org grow into the future, we now have open positions on the eGo Carshare Board of Directors. We are at a pivotal time in the organization’s existence as the mobility landscape continues to be more competitively served, and we are looking for leaders to help us meet the opportunities ahead.

Currently, eGo CarShare is looking for leaders with vision and in areas of expertise including:

  • Business Leaders in Bank/Finance, Property Owners, Tech & anyone else with mobility interest
  • Fund Development, Donor Cultivation & Grant Writing
  • Political & Government Leaders
  • Communications, Outreach or Media Relations
  • App/tech Developers

We are open to qualified and enthusiastic leaders with creative ideas for strategic funding initiatives and ways to leverage community partnering opportunities so that we can implement programs which will allow eGo to continue to evolve, while serving our business, residential, nonprofit and academic communities!

If you are interested in learning more, please contact peter@carshare.org or z.swank@gmail.com.

Financial Information

Our most recent 990 filings can be accessed at www.guidestar.org under the name “Boulder CarShare.”