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Meet the Team


Aimee Esposito
Executive Director
(602) 689-2896 | aimee@treesmatter.org

Aimee is a native Phoenician, growing up next to Piestewa Park. She has always had an appreciation for both the function and beauty of the desert environment. Aimee attended ASU where she learned the importance of bridging fields, receiving a BS in Geography and a BA in English Literature. Later Aimee ventured to Monterey, California where she spent two years earning a Master's degree in International Environmental Policy. Aimee returned to the Valley and has been with Trees Matter since 2013 becoming Executive Director in 2016. She is currently studying to become a certified arborist. Aimee’s favorite tree changes often but one of her favorite trees is the Prosopis juliflora, or the Native Mesquite.

Brittany Rinear
Remote Communications Assistant

Brittany has an extensive background in customer service, and is passionate about supporting our organization. After graduating from McClintock High School in Tempe, she lived in Portland, OR, and Santa Rosa, CA, where she developed a deep appreciation for ocean winds and cypress trees. Brittany is now a visual artist, creating and selling abstract paintings with various mediums, and is a ceramics student at Phoenix Center for the Arts. Her passion for gardening is mostly limited to indoor plants, especially in the summer! After providing occasional support for past projects, she is excited to move into a more substantial role at TM!

Ariel Stone
Volunteer & Outreach Manager
(602) 390-6792 | ariel@treesmatter.org

Ariel is an Arizona native, having grown up in downtown Phoenix. She graduated from ASU with a BS in Nonprofit Leadership and Management, and has volunteered for nonprofits since a young age. She volunteered with Trees Matter while a freshman at ASU and is glad to be back as part of the team! Ariel values the importance of trees and other plants native to the desert southwest, and is particularly interested in ensuring that they thrive in a rapidly growing urban setting. While she’s excited how fast Phoenix has been growing both culturally and economically in recent years, she believes Trees Matter can have impact on making sure this growth happens in the most sustainable way. She loves traveling, drawing, yoga, and live music. Ariel’s favorite tree is the Parkinsonia, or Palo Verde. 

Ali Guttenberg
 Americorps Vista Member

Ali was born and raised in North Carolina and recently moved to Arizona to join the Trees Matter team. Ali will be working with the Trees for Schools program to expand environmental education for students and teachers. They graduated in May 2021 with a BA in Environmental Studies and a minor in Geological Sciences. They spent many summers working and attending summer camp and are excited to join their passion for the environment and working with kids. Ali deeply values trees for climate change mitigation impacts as well as their beauty. Ali is enjoying learning about Arizona trees and cannot wait to be in the classroom teaching! Outside of work they enjoy hiking, crafting, live music, and are currently learning to play the banjo. Ali’s favorite tree in the Tulip Poplar! 

Paulina Vu
Program Manager
(602) 618-5529 | paulina@treesmatter.org

Paulina was born in Arizona, and recently graduated with a concurrent degree in Sustainability and Global Studies. Her interest in sustainability in a local and global stage has led her to various projects, volunteering, and internships with organizations such as the Gaia Association, The International Rescue Committee, and the Arizona Department of Environmental Quality. Paulina is passionate about community engagement, and is excited to work towards a healthier, happier Phoenix. While at ASU, she was an intern for Trees Matter and is thrilled to join the team once again. She has always been in awe of nature and loves to hike, take photos, travel, and board games in her free time. Her favorite tree is the Hong Kong Orchid.

Bridget Abraham
Summer- Fall Events Intern

Bridget is a student at Arizona State University receiving a BS in Sustainability, a Minor in Business, and a Certificate in Cross-Sector Leadership. She is excited to be a part of the Trees Matter team to bring awareness to her home state about the importance of tree coverage and reducing Arizona's heat island. Her favorite tree is the Cherry Blossom, as she was fortunate enough to see the trees in full bloom in Portland, Oregon. Lastly, she runs a small business of custom self-defense keychains to protect those who need it most.

Elisabeth Bowler
Fall Events Intern
Elisabeth is a student at ASU receiving a BS in Sustainability and Minor in Organizational Leadership. She has lived in Arizona most of her life, her younger years in North-Eastern Arizona, and her more recent years in the East Valley. Her hobbies include kayaking, hiking, and road trips. She is passionate about spreading awareness of environmental issues through everyday actions. She looks forward to working with communities throughout the Valley to provide trees in much needed areas. Her favorite tree is the Ponderosa Pine.

Shea Mattingly
Fall Events Intern 
Shea is an incoming senior at ASU receiving a BA in Sustainability, and Minor in Global Health. She's excited to be part of the Trees Matter team to bring awareness and educate the community about the importance and benefits of tree coverage in the Valley. Her favorite tree is the Cherry Blossom for its beauty, and the Vitellaria paradoxa, commonly known as the shea tree (same name, pretty cool)! Her hobbies include nature photography, long walks outside, and taking on new adventures with friends and family.

Cabot Brunkenhoefer
Fall Events Intern
Cabot is a senior at ASU, studying Sustainability, and graduates in December! Originally from Corpus Christi, Texas, his passions and hobbies include fishing, hunting, and baseball. Through this internship, he strives to gain knowledge and experience about the world of trees and hopes to use this information to better the planet after graduating law school. His favorite trees are Aspens! 

The Office

734 W. Polk St. Phoenix, AZ 85007

Mailing Address

PO Box 2648 Phoenix, AZ 85002

Our office is in the building of The McKinley Club, a co-sharing workspace. Feel free to ask around--we all know each other. We look forward to seeing you soon!

If you want to mail something to us please use our mailing address listed on the right.

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      (602) 689-2896 | 734 W. Polk St, Phoenix, AZ 85007