Martín Soto is a highly respected Mexican voice actor with a career spanning several decades, beginning in the early 1980s. He is formally trained in acting, having studied at the Instituto Andrés Soler in Mexico City, which is affiliated with the Asociación Nacional de Actores. His entry into the dubbing industry came in 1982, facilitated by colleagues from acting school. In addition to performing, Soto has also worked as a director, translator, and dialogue adapter for dubbed productions.

Soto's voice work is extensive and covers a wide range of characters in the Spanish dubbing of numerous international series and films. He is particularly well-known for his roles in anime, where his credits are varied and numerous. As specified, he provided the voice for Chef Kawasaki in the anime series Kirby: Right Back At Ya! and for Makoto Kawamoto in The Irresponsible Captain Tylor. His other significant anime roles include Malik Ishtar in Yu-Gi-Oh!, Champa in Dragon Ball Super, the Jusenkyo Guide in Ranma ½, Tessai Tsukabishi in Bleach, and Professor Utonium in the anime-styled Demashitaa! Powerpuff Girls Z. He has also been involved in major franchises such as Pokémon and Naruto.

Beyond anime, Martín Soto is a prominent figure in the dubbing of Western animation and live-action films. One of his most iconic and personally favorite roles is that of Dr. Egon Spengler, which he voiced in both the live-action Ghostbusters films and The Real Ghostbusters animated series. Another signature role is Professor Utonium in the Latin American Spanish dub of The Powerpuff Girls. His work also includes being the voice of Neo in the first Matrix film, Marvin the Martian in various Looney Tunes projects, and characters in series like The Simpsons and The Adventures of Jackie Chan.

Throughout his long career, Soto has worked with numerous other notable figures in the Mexican dubbing industry. He has cited Narciso Busquets as a key mentor and has frequently collaborated with actors such as Emilio Guerrero, Salvador Delgado, and Humberto Solórzano. His work on the Ghostbusters franchise, for instance, placed him alongside actors like Yamil Atala and the late Jesús Barrero.

Soto's achievements are marked by his longevity and the iconic status of many of his characters in Latin American pop culture. He is celebrated for his versatility, having voiced everything from comedic characters to dramatic roles. In the Transformers franchise, he is noted for being the first actor to voice three different characters in three distinct continuity families. In a 2013 interview, he expressed his gratitude for the public's interest in his career and his enduring satisfaction with the craft of dubbing. Later in his career, he mentioned reducing his workload due to age and personal commitments, while remaining open to participating in projects that specifically require his talents.