Advisory Board


Ashley Guesman

Project Director & Executive Co-Chair

Ashley Guesman is the Gift Processing and Donor Relations Coordinator at Denver Botanic Gardens. In May 2019, Ashley earned a Masters in Public Administration with a concentration in Nonprofit Organizations from University of Colorado Denver. Ashley has a Bachelor of Arts from Sarah Lawrence College in Bronxville, NY, where she studied art history, French, and writing. Within the nonprofit sector, Ashley is dedicated to expanding on and improving access for all to cultural and scientific organizations. Striving for greater levels of civic engagement and community participation are also in the forefront of Ashley's mind when developing policies and procedures within the nonprofit space.  Ashley enjoys yoga, collecting vintage clothing and housewares, eating sushi, and spending time with her cats, Eloise and Alaistair.


Isamar Tello


Isamar Tello is the Investigations Lead with the Division of Labor Standards and Statistics working to investigate and adjudicate claims for earned wages not paid. She graduated from the University of Colorado Denver with a Master of Public Administration and dual B.A degrees in International Marketing and Media and Spanish Language and Literature from Texas A&M University. Isamar is passionate about creating and supporting collaborations between government and nonprofit organizations in order to best serve the community. Isamar is also dedicated in helping the Spanish speaking community. On her free time, she enjoys spending time with friends, attending culture events around Denver, seeing live shows, cooking/baking, and traveling to new countries. 


Evan Sheehan 


Bio coming soon.

Paige Castañeda


Committee: Co-Chair of Professional Development

Paige Castañeda is a student at the University of Colorado, Denver campus working towards her Master of Public Administration with a concentration in nonprofit management. This semester she will be completing her capstone with the Humane Society of Boulder Valley where she has volunteered for many years. Currently, she is a Budget Analyst for CDOT and overseeing a Local Agency Program for city & county grants. In the upcoming year, she plans to begin a nonprofit shelter for miniature barn animals in the northern part of the state. She is passionate about public finance, women's rights, and animal welfare. In her spare time, Paige can be found swing dancing at the Mercury Cafe or volunteering with Denver Community Bucket.


MM_headshot.pngMary Marshall

Board Member at Large

Committee: Professional Development

Mary Marshall is currently working as the Marketing & Communications Manager, and the Solar Forward Program Manager at Solar Energy International (SEI), a 501(c)(3) non-profit technical solar installation training facility. With over 70,000 alumni worldwide, SEI is an industry-leader in solar workforce development. As the Solar Forward Program Manager, Mary manages SEI's technical consulting program aimed at empowering rural communities with tools and guidance in order to kickstart solar markets and increase access to renewable energy and resiliency across Colorado.

As a former AmeriCorps VISTA at SEI, Mary worked on community outreach efforts in Delta County aimed at diversifying the local economy through solar, including spearheading Solarize Delta County Farms, a campaign which brought resources on renewable energy and energy efficiency to agricultural producers and rural businesses in Delta County. Mary has past experience in television news working at shows such as NBC’s Dateline, Nightly News with Lester Holt, MSNBC Live with Thomas Roberts and working with Tom Brokaw in his research unit. In her free time you can find her running the trails or playing the fiddle! 


Tamara Berkman

Board Member at Large

Tamara Berkman is a Denver native whose passions include community engagement, art, and health. Tamara works for Goodwill of Colorado as a Job Developer helping needy families prepare for the workforce. Prior to Goodwill, Tamara held roles in communications and programming at a fortune 500 company and a tiny religious organization. Tamara graduated Magna Cum Laude from the University of Colorado in 2010 with a degree in Communication

In her spare time, you are most likely to find Tamara working on a craft project with her dog cuddled up beside her. Tamara very much enjoys exploring Denver with her friends and cheering on sports teams with her family.

Tamara’s goals involve tuning into her passions to create a well-rounded life where she can have a fulfilling career, a healthy lifestyle, strong relationships and make a difference in her community.






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