All Articles in this Issue from 2 Countries: Nigeria 
(Nnamdi Azikiwe University, University of Nigeria, Michael Okpara University of Agriculture, Enugu State University of Science and Technology), and Indonesia 
(Universitas Bhayangkara Jakarta Raya, Universitas Mercu Buana).
INDONESIA
Casa Amira Prive Jl. H. Risin No. 64D Pondok Jagung Timur, Serpong Utara, Tangerang Selatan, Indonesia
Greenation International Journal of Engineering Science (GIJES), Yayasan Global Research National (GREENATION), is registered with the Directorate General of General Law Administration, Ministry of Law of the Republic of Indonesia, under Number SP: AHU-0009609.AH.01.04.Tahun 2020 (Online), AHU-0009609.AH.01.04.Tahun 2020 (Offline), dated June 22, 2020.
Greenation International Journal of Engineering Science (GIJES) collaborates with several institutions, including Universitas Sains dan Teknologi Indonesia (USTI), Pekanbaru, Politeknik PIKSI GANESHA, Bandung, Politeknik Piksi Ganesha Kebumen, Akademi Teknologi Bogor, Akademi Telekomunikasi Bogor, Institut Az Zuhra, Pekanbaru, PPT-Vokasi Indonesia, Universitas Muhammadiyah Jakarta, Mindanao State University, Philippines, Universidad de Manila, Philippines, and Anhui Wentech, China.
