Marcos D. Colon Sierra, age 55, passed away on October 30, 2025 at Baystate Medical Center. He was born on December 28, 1969 in San Juan, Puerto Rico, son of the late Carmen Milagros Sierra Vega. He is survived by his father Eliel Colon Aulet of Puerto Rico, one son, Eliel Colon of CT, three daughters, Mileydis Colon, Deisimar Colon and Diorelis Colon all of Puerto Rico; one brother, Elier Colon Sierra and his wife Aurea Colon of New Jersey, one nephew, Elier J. Colon and one niece, Elimar M. Colon along with many grandchildren, extended family members and friends who will miss him dearly. All services will be held in Puerto Rico. The Grise Funeral Home is entrusted with arrangements. For online condolences, please visit www.GriseFH.com.