Our Consultants

Jeremy Grandstaff, Partner, Organizational Consultant

As co-founder of S&G Endeavors, Jeremy brings a list of assets to all projects through his deep understanding of group dynamics and collaborative planning initiatives, comprehensive understanding of organization development, and his personal experience as a blind person achieving the highest level of advocacy objectives. He has served as the lead consultant on hundreds of client engagements that include retreat facilitation, organization coaching, merger facilitation, campaign training, blended collaborative strategic planning, and long-term change initiatives. Clients with which he has worked include Nebraska Health and Human Services, American Public Health Association, Nebraska Walkable Communities Initiative, City of New Orleans, City of Chicago, Bike East Bay, Bike Cleveland, Asakura Robinson, , and America Walks.

Jeremy’s education and background include a master’s degree in organization development and a BS in Management Information Systems from Bowling green State University, five years as the Member Services Director for Alliance for Biking & Walking, and four years as a production/quality manager for IBM Global Services. Jeremy had the opportunity to intern with Kathy Dannemiller and Roland Loup, both pioneers of whole-scale change — a collaborative strategic planning process that engages the organization in a more complete vision and tactical plan. Jeremy has also been formally trained in small-group facilitation by the Training for Trainers Cooperative and leads such education for other trainers.

Jeremy lives in Alexandria Virginia with his Husband and dog, where he serves as 2ND Vice President of NFBV’s Greater alexandria Chapter, member of Alexandria’s Bicycle & Pedestrian Committee, and a founding member of Alexandria’s Families for Safe Streets, just to name a few organizations. “I’m so excited to work with local organizations that are dynamically growing engaged stakeholders and are making a difference in my community; this gives me new insights and ways to grow each day.”

Download Jeremy’s Full Portfolio (PDF)

Connect with Jeremy: (614) 519-3026 | Email | Linked In | Facebook |Twitter | Page Jeremy | Skype = jeremygrandstaff

John Spalding, Partner, Organization Development Consultant

Picture of John Spalding
John Spalding has a master’s degree in Organization Development from Bowling Green State University and participated in the Dannemiller – Whole Systems Practicum in 2003. Some of the organizations John has worked with include University Christian Fellowship, The City of Detroit Health Department, Clarcor/TFS, The Sisters of Notre Dame Schools, Dana Corporation, and G1NBC.com.  John has management experience in the fields of MR/DD and Youth Development.

John as teaches Industrial Organizational Psychology at Owens Community College.  He has also taught Introduction to Psychology and Careers in Psychology.  In addition, he has conducted various service research initiatives for retail organizations and in education as a learning and literacy consultant. He is currently the editorial coordinator for the Digital 1st Interactive CourseBook on the Principles of Management with Dr. Steven Cady and McGraw-Hill.
Connect with John: (614) 519-5867 | Email

Jerry Jayjohn, Special Projects Manager

Jerry Jayjohn comes to S&G with a diverse background in process and project management, bringing experience from the research and health sectors to our team. His attention to detail and great project management skills, combined with overall positive attitude help S&G take our work with clients to the next level.   Jerry has two degrees in his wheel of knowledge, as well as being a process trainer in his previous work experience. Originally from Ohio but currently living and working in the DC area, he brings a wealth of lifetime experience from small town personal touches to large city efficiency.  He has also worked with many community organization boards and helps ensure that S&G projects run smoothly and that our process is solid and seamless.

Connect with Jerry: (614) 595-9145 | E-mail

Rob Sadowsky, Partner Consultant


Rob  Sadowsky has more than thirty years of public experience in housing, economic development and transportation. He is the Transportation Safety Outreach Coordinator for the Department of Transportation and Development of Clackamas County, Oregon. He has served as the executive director of The Street Trust (formerly the Bicycle Transportation Alliance) in Portland, Oregon; the Active Transportation Alliance in Chicago; and the Chicago Mutual Housing Network. Rob served as the Director of Corporate and Foundation Giving at the Jewish Council on Urban Affairs and as the Director of the Community Ventures Program, an innovative program linking private investors in affordable housing and economic development projects. He brings experience in training low income housing residents in resident management and ownership. He conducts training and strategic planning workshops for emerging organizations and is a board member of the Training for Trainers Cooperative. Rob loves serving as a management or executive coach and helping dynamic nonprofits and companies level up to thrive.

Rob holds a Bachelor’s Degree from the University of Michigan’s Residential College in Social Science. He is a candidate for the Executive Masters in Public Administration at Portland State University. He has served on committees focusing on climate change, affordable housing, transportation safety and low-income transit fares. Other organizations Rob has worked for include: Bark, POCA Technical Institute, the Madison Mutual Housing Association in Madison, Wisconsin; Peoples Housing in Chicago; the Chicago Mutual Housing Network and the North American Students of Cooperation in Ann Arbor, Michigan.

Connect with Rob: (503)-519-8081 | Email  | Linked In |Twitter

René Rivera, Partner Consultant

René Rivera is a leader and bridge-builder, working and learning in all the spaces in-between race, gender, and other perceived binaries, as a queer, mixed-race, trans man. René has led bicycle advocacy groups in the San Francisco bare area for the last 8 years, as Executive Director for the San Francisco Bicycle Coalition (SFBC) in 2010, and Executive Director of Bike East Bay from 2011-2018.

René was a board member of SFBC before becoming the Executive Director of the organization and as a board member he led their strategic planning process in 2007, and also supported their strategic plan as a consultant in 2012.

At Bike East Bay, René lead the organization through several iterations of strategic planning and engaged 125 member staff, board, members and stakeholders in a two day summit, in collaboration with Jeremy Grandstaff.  René has also lead a deep cultural change process at Bike East Bay to integrate diversity, equity and inclusion into the organization’s strategic goals, operating values and board/staff culture.

Starting in 2018 René has focused more on building his consulting practice and as a member of the Untokening Collective leadership team, he has helped organize the 3rd annual Untokening Convening in Detroit, MI.

René has a had a long-time passion for meditation and leads classes and workshops on meditation.  He serves as board member and diversity chair at Spirit Rock Meditation Center, and has led the process to develop a Diversity, Equity, and Inclusion plan for the center. René currently resides in Oakland, CA.

Connect with René: E-mail