Can I work in Korea even if my Korean language skills are not very good?

Hello. I am a Korean citizen with a resident registration card, but due to living in the United States when I was young, my Korean speaking and writing skills are still lacking. Nevertheless, I want to work in Korea and am planning to apply for a job in the facility management field. I have obtained a level 2 fire safety manager certificate and am also preparing for an electrician license. My biggest concern is my slow and awkward Korean language skills. I am worried about the language abilities that Korean society demands from employees. I have an academic degree, but I don't think it will be very helpful. Are there many people who have difficulty finding employment due to their Korean language skills in this situation? I would like to hear advice from those who have had similar experiences.