Keith Michael Mannix, age 49, formerly of Somerville, Massachusetts, and most recently of Denver, Colorado, passed away suddenly shortly after relocating to Colorado.

Born in Cambridge and raised in Somerville, Keith was the cherished son of Nancy (Viera) and Kevin R. Mannix. He was fiercely proud of his Somerville roots and graduated from Somerville High School, playing hockey for the Somerville Highlanders. This early love for the game grew into a lifelong, deep passion for all Boston sports especially the Patriots, and he could always be found loudly cheering on his hometown teams. A plumber by trade, Keith was known by everyone as a generous and dependable soul. He was truly the ultimate "go-to guy," always ready to lend a helping hand to anyone in need, and a fiercely loyal friend to many.

Keith will be remembered by so many for his lively, fun-loving nature, his sharp sense of humor, and his effortless ability to be the life of the party. Always up for an adventure, he lived life to the fullest—whether he was racing across the water on his jet ski, carving down the snowy slopes in the winter, or showing off his lifelong passion for cars. An ardent animal lover, Keith shared a special bond and loved his dogs, Lucy and Lola. He also truly appreciated the finer things in life, finding joy in a perfectly cooked steak, fine colognes, and sharp fashion, which he always wore with a distinct Boston flair.

In addition to his beloved parents, Nancy and Kevin, Keith is survived by his cherished sister, Kelley Mannix of Winthrop, and his loving partner, Gabriella Lombardi and her family of Denver, Colorado. Keith was also a deeply devoted uncle and father figure to his niece, Caitlin DeMedeiros, and her fiancé, Jose Barbosa.

He leaves behind several aunts, uncles, cousins, and a vast circle of friends who loved him dearly. Above all else, Keith treasured the time spent surrounded by those he loved and the many who loved him in return. His vibrant spirit leaves a deep, enduring void in the lives of everyone who had the privilege of knowing him.

Funeral Services for Keith will be announced in the coming days.