Jonathan Ramírez is a Mexican voice actor and broadcaster based in Miami, Florida, with over two decades of experience in the industry. Originally from Mexico City, he relocated to Miami and built a career that spans voice-over work for commercials, television, and animation, as well as work as a presenter and host. He began his professional journey in the United States working in account management at an advertising agency, which led to involvement in voice-over recording sessions and ultimately a career change into voice acting. His first major voice-over opportunity was a commercial for Delta Airlines.

In the realm of anime dubbing, Ramírez has contributed his voice to several series for international distribution. He is known for his work on the globally distributed series My Hero Academia, where he voices multiple characters including the Hero Backdraft, Native, Kesagiri Man, and Onima. He also played the role of a Hoodlum, or matón, in the series Akudama Drive. His other anime credits include additional voices in Glitter Force and Higurashi: When They Cry - GOU, as well as the My Hero Academia OVA.

Beyond anime, Ramírez has an extensive body of work in animated series. He has been part of the Spanish dubbing cast for South Park since 2011, providing voices for characters such as Satan, Barack Obama, Dougie, Pete, and Skeeter in various seasons and redubs. His other animation credits include roles in Daniel Tiger's Neighborhood, The Fairly OddParents, and the video game adaptation South Park.

Ramírez's voice acting career extends to commercials, corporate videos, and video games for a wide array of major clients. His clients have included Funimation, National Geographic, Ubisoft, Samsung, Amazon Music, Rocket Mortgage, McDonald's, Uber, Ford, HBO, and Coca-Cola, among many others. He is a bilingual talent, working fluently in both Spanish (neutral and Mexican accents) and English. His work has been recognized with nominations and awards from the Voice Arts Awards presented by the Society of Voice Arts and Sciences (SOVAS). He is a member of the SAG-AFTRA union.