I'm Sergio Castillo Mujica, a passionate sound engineer focused on delivering pristine live and studio audio. My work spans FOH and monitor mixing for high-traffic shows, festival setups, and in-studio productions, with a strong emphasis on cohesion, sonic clarity, and on-time delivery. I thrive in collaborative environments, from stage crews to production teams, and I enjoy crafting natural, immersive soundscapes for documentaries, music videos, and live concerts.…

Sergio Castillo Mujica

I'm Sergio Castillo Mujica, a passionate sound engineer focused on delivering pristine live and studio audio. My work spans FOH and monitor mixing for high-traffic shows, festival setups, and in-studio productions, with a strong emphasis on cohesion, sonic clarity, and on-time delivery. I thrive in collaborative environments, from stage crews to production teams, and I enjoy crafting natural, immersive soundscapes for documentaries, music videos, and live concerts.…

Available to hire

I’m Sergio Castillo Mujica, a passionate sound engineer focused on delivering pristine live and studio audio. My work spans FOH and monitor mixing for high-traffic shows, festival setups, and in-studio productions, with a strong emphasis on cohesion, sonic clarity, and on-time delivery.

I thrive in collaborative environments, from stage crews to production teams, and I enjoy crafting natural, immersive soundscapes for documentaries, music videos, and live concerts.

See more

Skills

Experience Level

Pro Tools
Expert
Ableton Live
Expert
Logic Pro
Expert
Mix
Expert
Master
Expert
Music Theory
Expert
Soundtrack
Expert
Music Video
Intermediate

Language

Spanish; Castilian
Fluent
English
Fluent

Work Experience

Sound Engineer and Music Producer at Independent
January 1, 2025 - Present
Currently working on five musical projects acting as sound engineer and music producer, focusing on achieving high-quality technical and creative outcomes. Also providing live sound for shows and performing as an electric guitar musician.
Stage Manager and Sound Engineer at Various Festivals including Cordillera, Jazz al Parque, Hermoso Ruido, and Festival Péndola II
February 1, 2023 - Present
Performed several roles in the production of musical events, including stage management and sound engineering duties to ensure smooth, timely, and high-quality performances. Managed monitoring systems and venue sound engineering, developing technical, leadership, and teamwork skills in diverse and creative environments.
Recording Assistant at Árbol Naranja Studio
November 1, 2024 - August 23, 2025
Completed a work placement as a recording assistant in the studio, gaining deep understanding of the role and responsibilities during sessions. Collaborated effectively with technical teams and musicians, strengthening technical skills and fostering a professional and productive recording environment.
Sound Designer and Music Composer at Independent
September 30, 2024 - August 22, 2025
Designed the sound for a documentary to recreate the natural richness of ecosystems, composed, recorded, and edited music for the project, and collaborated in the final mixing ensuring cohesion and sound quality of the documentary.
Audio Production Instructor and Studio Monitor at Pontificia Universidad Javeriana
November 1, 2024 - August 23, 2025
Taught classes on managing audiovisual production studios, improving teaching methods and creating a dynamic learning environment. Monitored foley and film mixing studios and mixed and mastered music pieces used in institutional video projects, ensuring high-quality sound production standards.
Mixing and Mastering Engineer at HSV Visual and AA&PP
August 1, 2023 - August 23, 2025
Mixed and mastered sound pieces for videos and educational materials. Managed tasks efficiently to contribute to a positive work environment, which resulted in smooth and successful recording experiences.
Recording Assistant at La Locortés
March 31, 2023 - August 22, 2025
Focused on tasks to efficiently execute recording sessions contributing to a positive and creative work climate during the recording of a music project.
Live Sound Engineer at Independent / Freelance (Festivals & Concerts)
December 1, 2023 - Present
Live sound engineering for high-traffic shows; FOH and monitor mixing; produced and oversaw full production for the track 'Plomo' (recording, mixing, mastering).
Stage Manager at Cordillera & Jazz al Parque Festivals
December 1, 2023 - Present
Stage management for Cordillera and Jazz al Parque festivals; coordination with artists and technical teams to ensure smooth performances.
FOH and Monitor Mixing Engineer at Hermoso Ruido Festival & Pendola II Festival
December 1, 2023 - Present
FOH and monitor mixing for multiple festival lineups; sound design support and coordination with festival crews.
Recording Assistant at Mi Primer Sencillo – Canal 13
March 1, 2023 - April 1, 2023
Recording assistant for the music reality show; contributed to audio capture and post-production processes.
Recording Assistant at Árbol Naranja Studio
July 1, 2023 - November 1, 2024
Recording assistant at Árbol Naranja Studio; supported live sessions, mixing and mastering workflows.

Education

Bachelor´s degree in Music with an emphasis in Sound Engineering at Pontificia Universidad Javeriana
July 1, 2019 - March 1, 2025
Guitar, ensamble and performance at Classics Stone Music Center
July 1, 2023 - July 1, 2024
Bachelor's Degree in Music with an Emphasis in Sound Engineering at Pontificia Universidad Javeriana
January 1, 2019 - January 1, 2024
Music Performance at Classic Stone Music Center
January 1, 2023 - January 1, 2024

Qualifications

Add your qualifications or awards here.

Industry Experience

Media & Entertainment, Travel & Hospitality, Professional Services
    paper Mixing & Mastering Portfolio

    This playlist showcases a selection of music projects I have worked on as a mixing and mastering engineer. Each track reflects my commitment to clarity, balance, and enhancing the artist’s creative vision. The playlist includes collaborations across diverse genres, highlighting my adaptability and attention to detail in both technical and artistic aspects of audio production.

    https://www.twine.net/signin

    paper LIVE FROM LA SELVA, Frank Lucas

    Last year, I had the opportunity to work as a recording assistant at Árbol Naranja recording studio in Bogotá, Colombia.

    Our goal was to produce a live session album in just one week, including both audio and video.
    We spent the first three days recording all the audio tracks. Then, over the next two days, we filmed the video sessions by playing back the recorded material for each song.

    It was an intense but rewarding experience that taught me a lot about efficiency, teamwork, and the fast-paced nature of live session production. Grateful to have been part of such a creative and collaborative project.

    The live sessions are available in youtube via these link:
    https://youtube.com/playlist?list=PLLHpC-2X2HHkjDgXf51SwT0MJmXgvA7vh&si=ZDQf3T5P92U1uWZh

    paper El secreto Nariño

    In this project, I composed original music representing the diverse regions of the Pacific, Amazon, and Andean areas of Colombia for a documentary. My goal was to capture the cultural essence of each region, creating melodies that resonate with their unique identities.
    In addition to composition, I handled the sound design for the documentary, providing immersive audio environments for each location featured. This involved recording and mixing all sound elements to ensure every detail was perfect. Throughout the process, I maintained clear and effective communication with the client, incorporating their feedback and notes to achieve the best possible outcome.

    The documentary is available in youtube via these link: