Alejandro began his journey in the marching arts before high school, but it was during his time at Passaic High School where he truly developed and excelled. After graduating, he returned to Passaic, serving as an instructor for six years in various roles, including Visual Caption Head (2015–2018), Brass Caption Head (2018), and Visual Designer (2021–2023). He also served as Visual Designer for Wayne Valley High School (2024–2025). Since 2021, Alejandro has been the Visual Caption Head at Jupiter High School in Florida.

While teaching at Passaic, Alejandro was selected to march with The Cadets, where he spent four seasons. During his tenure, he held leadership positions as Trumpet Section Leader (2016) and Horn Sergeant (2017). He earned several accolades, including Visual Cadet of the Year (2016), Brass Cadet of the Year (2017), and Rookie Staff Member of the Year (2018).

Alejandro has also brought his talents to a few prestigious organizations, including Carolina Crown (Visual Staff, 2019), Santa Clara Vanguard (Visual Staff, 2024–2025), and his home corps, The Cadets (Visual Staff, 2018, 2020-2023). He is currently entering his fifth season with Stryke Wynds and his second season with The Troopers.

Outside of the marching arts, Alejandro is a high school mathematics teacher in South Florida, where he applies his Bachelor's Degree in Mathematics Education (K–12) from Montclair State University.