International Journal of Engineering Technology and Natural Sciences would like to honor and acknowledge the following colleague for their contribution to improve the quality of published issues.

1. Dr. Wahyuni Reksoatmodjo, Scopus ID: 55552533500, Universitas Gadjah Mada, Indonesia
2. Dr. Erik Iman Heri Ujianto, S.T., M.Kom., Scopus ID: 56888794200, Universitas Teknologi Yogyakarta, Indonesia
3. Dr. Ir. Arief Hermawan, M.T., IPU.,  Scopus ID: 56868482400, Universitas Teknologi Yogyakarta, Indonesia
4. Dr. Donny Avianto, S.T., M.T, Scopus ID: 57196041992, Universitas Teknologi Yogyakarta, Indonesia
5. M.S. Hendriyawan Achmad, S.T., M.Eng., PhD, Scopus ID: 57041250200, Universitas Teknologi Yogyakarta, Indonesia
6. Joko Sutopo, Ir., S.T., M.T., Ph.D., IPU. Scopus ID: 57191886933 ,Universitas Teknologi Yogyakarta, Indonesia
7. Dr. Rianto, S.Kom., M.Eng., Scopus ID: 56557116700 , Universitas Teknologi Yogyakarta, Indonesia
8. Dr. Ir. Endang Setyowati, M.T., Scopus ID: 57212207996 ,Universitas Teknologi Yogyakarta, Indonesia
9. Dr. Noram Irwan Ramli, Scopus ID : 54976264600, University Malaysia Pahang, Kuantan, Malaysia
10. Dr. Nanang Fatchurrohman, Scopus ID : 36671013800, University Malaysia Pahang, Kuantan, Malaysia
11. Prof. Kais Ismail Ibraheem, B.Sc., M.Sc., Ph.D, Scopus ID : 16176973900, University of Mosul, Mosul, Iraq
12. Dr. Eng. Gregory Spence Gutmann, Scopus ID : 56403051100, Tokyo Institute of Technology, Japan
13. Prof. Mirta Baranovic, Scopus ID : 8657284900, University of Zagreb, Kroasia
14. Prof. Mirjana Pejic Bach, Ph.D, Scopus ID : 14833251000, University of Zagreb, Crotia
15. Prof. Dr. Jasni Bt Mohamad Zain, MIEEE, Scopus ID: 16176973900, University Teknologi MARA (UiTM), Malaysia
16. Dr. Yulianto Purwono Prihatmaji, M.T., Scopus ID: 53865389000, Universitas Islam Indonesia, Indonesia