Board of Directors

Diana Giraldo - President, Co-Founder

As a child growing up in Bogota, Colombia, Diana spent nearly every Sunday enjoying active fun on 70 miles of closed roads and eating ice cream at Ciclovia! Now as a naturalized citizen of the USA she is determined to bring the same smiles and laughter to the children and adults of Southwest Florida.  Diana is an avid dog lover and volunteers with Senior Paws Sanctuary.

Diana is a 10-year resident of Lee County. She is inspired by sustainable community development, visualizes community growth encouraging social interaction, and a healthy community for all. She holds a Master’s Degree and is employed by the University of Florida’s County Extension office, IFAS.

Jessie Marcolini - Vice President


Anne Stutz - Secretary


John Lavalla - Treasurer


Diane Holm - Director, Co-Founder

Diane has been involved in health education for more than 15 years in Lee County. She will help anyone find fun, safety and fitness in walking, biking, and commuting without a motor! She wrote the grant that enabled Streets Alive to become a 501(c)3 non-profit organization to ensure longevity of the open streets concept. She is an active participant in SWFL Critical Mass, and has educated thousands of youth in helmet fit, safe walking, and safe bicycling.

With her husband Mike, she owns and operates Fort Myers Schwinn Cyclery. She holds a Bachelor’s Degree in Journalism. She is a lifetime member of Caloosa Riders Bicycle Club, a board member of the Lee County Injury Prevention Coalition, and an alternate for the Metropolitan Planning Organization’s Bicycle Pedestrian Advisory Council.

Barry Bratton - Director


Photo of Oscar Rattenborg

Oscar Rattenborg - Director


Rob Siebert - Director

Rob is a determined cyclist who helps everyone who wants to ride a bike to feel comfortable doing so! He is the founder/leader of Southwest Florida Critical Mass, home of eight monthly group rides which are open to the public at no charge and occur at different locations throughout Lee County. They are self-supporting, slow rides focused on socialization, safety and fun!

Rob is a Realtor. He is a single parent of twins, currently attending college. He manages the SWFL Critical Mass Facebook and SWFL Cycling Meetup pages.

Michelle Umbenhauer - Director


Lee Waller - Director

Lee grew up loving life outdoors in the small town of Alva, FL.  He was always on a bike, using it for transportation as well as recreation.  He continues that tradition today as a bike commuter and avid recreational cyclist.  He has ridden across the state of Florida in a single 170 mile ride as well as raced in numerous triathlons.  He currently serves on the Board of Directors of the Caloosa Riders Bicycle Club as the Vice President of Rides.  Lee is also a runner, competing in everything from 5K races to a full marathon.  In addition, he enjoys stand-up paddleboarding and kayaking.  As a heavy user of our Southwest Florida roadways, on foot, 2-wheels, and motor vehicles, he sees a huge value to making our streets safer for all users.

Lee graduated from Florida Gulf Coast University with a bachelor's degree in Environmental Studies.  He works for Lee County government managing and restoring environmentally sensitive lands as part of the Conservation 20/20 Land Program.

Past Board of Directors

-Ann Pierce

-Megan Fasig

-Isobel Hitchcock