DongHyeon Koo
Audio Post-Production Specialist | Sound Design, Sound Editing, ADR & M&E for Film & Series
Guro-Gu
Summary
Audio Post-Production Specialist with extensive experience in Netflix Post Services, leading worldwide M&E QC, Augmented M&E for Non-Fiction shows, and Dolby Atmos QC workflows.
Highly skilled in FX editing, foley coverage, dialogue restoration, PFX extraction, mixing support, and technical troubleshooting across complex post-production environments.
Experienced in delivering content for major global OTT platforms including Netflix, Disney+, Apple TV+, TVING, and WAVVE, supporting a wide range of international series and original productions.
Additional credits include feature films such as Parasite, Squid Game, and Gyeongseong Creature. Currently building and operating a one-person butique "Earlynight Studios", providing high-end sound design, foley, and post-production solutions for film and streaming content.
Overview
10
10
years of professional experience
5
5
Certifications
2
2
Languages
Work History
Freelance Sound Designer & Audio Post Specialist
EARLYNIGHT STUDIOS
12.2025 - Current
- Independent sound designer building a boutique one-person audio post studio focused on sound design, sound editing, dialogue restoration, and M&E edit and creation.
- Currently open to freelance projects and actively looking to collaborate with filmmakers, studios, and creators who need cinematic, detailed, and story-driven sound.
Sound Services Operator
Netflix
12.2023 - 12.2025
- The Netflix Post Production Sound Services team oversees QC reviews and executes non-creative technical fixes to ensure all audio meets the highest delivery standards.
- Key responsibilities include:
- Title Coordinator: Coordinating high-visibility titles and ensuring all deliverables meet Netflix technical and operational standards
- Verifying audio deliveries and taking responsibility for accuracy, consistency, and timely completion
- Spearheading the implementation of Dolby Atmos workflows across the team, including pipeline setup, tool optimization, and documentation of standards
- Educating and mentoring team members on Dolby Atmos concepts, technical specifications, and operational procedures to elevate overall team capability
- Performing QC checks and technical adjustments to prepare clean M&E tracks for dubbing
- Collaborating closely as a global team to support efficient dubbing preparation
- Maintaining a seamless workflow through clear communication and coordinated teamwork
- Utilizing multiple cloud-based collaboration tools to share, update, and track work in real time
- Upholding industry-leading standards to deliver the highest-quality sound services
- Creating augmented M&E for unscripted shows, adding missing PFX or designing supplemental effects when needed
Sound Designer
Moby Sound
10.2022 - 12.2024
- Sound Designer / Editor, ADR Recordist, Mixing Engineer
- Designed and edited sound effects for After School (방과후 전쟁활동) and Netflix’s Gyeongseong Creature (경성크리처), covering guns, explosions, creature sounds, vehicles, and complex action design. Worked on multiple limited series, TV shows, and OTT original projects, delivering full sound editing, sound design, and technical polishing. Experienced in augmented M&E creation for unscripted shows, adding missing PFX or designing new effects when required.
Sound Editor
Livetone
10.2017 - 12.2021
- Koo worked primarily as a sound editor in audio post-production studios, focusing mainly on sound effects and contributing to the Foley editing for several films. Since his second year, he also took on the role of a mixing technician and provided technical support and maintenance for two dubbing stages, two recording rooms, and seven editing rooms.
- Credits: Squid Game, Parasite, Netflix Kingdom Season 1-2, Netflix #Alive, InRang the wolf brigade
Intern
Glenwood Place Studios
11.2015 - 06.2016
- Maintenance and cleaning inside and outside of studios. Help assist engineer for setting up a session recording. Errands for Clients such as Bruno Mars, Pharrell Williams, and more A list artist.
Intern
Studio Malibu
09.2015 - 11.2015
- Setting up sessions for recording, voiceover, and ADR work. Recording vocals for Prodigy from Mobb Deep and setup for Lady Gaga. Maintaining and cleaning both the inside and outside of studios.
Education
Bachelor of Science - Recording Arts
Full Sail University
Winter Park, Florida01.2015
Certification - Electronic Dance Music
SAE Institute (USA)
Miami01.2013
Certification - American English
RENNERT Language School
Miami01.2013
Skills
M&E Creation QC
Certification
Wwise 101
Timeline
Freelance Sound Designer & Audio Post Specialist
EARLYNIGHT STUDIOS
12.2025 - Current
Sound Services Operator
Netflix
12.2023 - 12.2025
Sound Designer
Moby Sound
10.2022 - 12.2024
Sound Editor
Livetone
10.2017 - 12.2021
Intern
Glenwood Place Studios
11.2015 - 06.2016
Intern
Studio Malibu
09.2015 - 11.2015
Bachelor of Science - Recording Arts
Full Sail University
Certification - Electronic Dance Music
SAE Institute (USA)
Certification - American English
RENNERT Language School