1. 한국철도공사 - https://www.jobplanet.co.kr/companies/86756
2. 에스알주식회사 - https://www.jobplanet.co.kr/companies/316298
3. 코레일네트웍스 - https://www.jobplanet.co.kr/companies/90279
4. 코레일관광개발 - https://www.jobplanet.co.kr/companies/7388
5. 코레일로지스 - https://www.jobplanet.co.kr/companies/7387
6. 코레일테크 - https://www.jobplanet.co.kr/companies/7384
7. 공항철도주식회사(구 코레일공항철도) - https://www.jobplanet.co.kr/companies/7389
8. 서울메트로 - https://www.jobplanet.co.kr/companies/28501
9. 서울메트로환경 - https://www.jobplanet.co.kr/companies/93638
10. 서울메트로9호선운영 - https://www.jobplanet.co.kr/companies/308141
11. 서울특별시도시철도공사 - https://www.jobplanet.co.kr/companies/88230
12. 서울9호선운영주식회사 - https://www.jobplanet.co.kr/companies/88200
13. 인천교통공사 - https://www.jobplanet.co.kr/companies/92917
14. 네오트랜스주식회사 - https://www.jobplanet.co.kr/companies/87745
15. 한국철도시설공단 - https://www.jobplanet.co.kr/companies/136988
SPC같은 페이퍼 컴퍼니는 제외함. 경전철 회사 제외함.
