Our People

About Guiin Our People Center Tour Hours & Directions Call : 010-6599-0109

People who treat you as an honored guest

Guiin Hearing is a hearing-rehabilitation center where certified audiologists consult with you in person.
We do not simply sell hearing aids — guiin means “an honored guest” in Korean,
and that is exactly how we treat every customer: with expertise, care, and sincere companionship.

Audiologist Lee Seong-haeng
Audiologist

Lee Seong-haeng CEO

  • Certified audiologist, Korean Society of Otorhinolaryngology — Audiology
  • Full member, American Speech-Language-Hearing Association
  • Completed audiologist member training, Korean Audiological Society
  • Completed audiologist course, Korean Society of Otorhinolaryngology
  • Graduate, Blue Mountain Academy, USA
  • Graduate, AIU University, Atlanta, GA
  • Completed Bachelor of Business coursework, Cornell
  • Completed “The Life of Christ,” Salvation Army
  • Completed “GOD IS THERE,” EMMAUS School
  • Member, Korea–Russia Olympic Organizing Committee
  • Head of Seoul Special Advisory Group, 2023 Election General Headquarters
Audiologist Yoon Dong-hoo
Audiologist

Yoon Dong-hoo

  • Certified audiologist, Korean Society of Otorhinolaryngology — Audiology
  • Formerly at Oticon Hearing Aids, Dongnae Center
  • Completed audiologist training course
  • Formerly at Rexton Hearing Aids (Germany), Busan East Branch
  • B.S., Gyeongsang National University
  • M.S., University of Science & Technology (UST), Korea
Audiologist Yoon Na-young
Audiologist

Yoon Na-young

  • Certified audiologist, Korean Society of Otorhinolaryngology — Audiology
  • Formerly at Signia Hearing Aids (Germany)
  • Hearing-aid consultation, Dong-eui Medical Center ENT
  • Hearing-aid consultation, Oticon at Dongmyeong ENT Clinic
  • B.S., Pusan National University

Licenses & Certifications

Certificates and diplomas Awards and certifications Certification Certification