The publishing and editorial teams would like to thank the following, for their invaluable service as 2021 reviewers for this journal. We are very grateful for the contributions made. With their help, the journal has been able to publish such high-quality articles: 

    
Abdul Halim Lim, Sarina 
Ackermann, Andres
Akmal, Adeel
Albliwi, Saja
Amorim, Gabriela Fonseca
Arcidiacono, Gabriele
B G , Aadithya 
Badar, M. Affan
Balzer, William
Banuelas, Ricardo
Bashiri, Mahdi
Beelaerts Van Blokland, Wouter
Bernardo, Merce 
Bhasin, Sanjay
Bhat, Shreeranga
Bossert, James
Boukherroub, Tasseda
Büyüksaatçı Kiriş, Sinem
Cardenas-Cristancho, Diana
Carlos Sa, Jose
Chakraborty, Ayon
Chin, Kwai-Sang 
Cormican, Kathryn
Cross, Jennifer
Cudney, Elizabeth
Demirtas, Ruya
Desai, Darshak
Desai, Tushar
Dhakal, Hom
Dibia, Ifechukwude
Dibia, Kingsley
Does, Ronald
Doulat, Mehran
Durakovic, Benjamin
Elias, Arun
Ev, Gijo
Farinha, Luis
Fernandes, Marcelo
Ferreira, Luis
Franceschini, Fiorenzo
Furterer, Sandra
G.S., Sureshchandar
Gaffar, Vanessa
Gaiardelli, Paolo
Garza-Reyes, Jose Arturo
Gładysz, Bartłomiej
Goh, T
Gremyr, Ida
Gupta, Sumit
Gurumurthy, Anand
Gutierrez, Leopoldo
He, Zhen
Hoerl, Roger
Iswanto, A
Jain, Vineet
Jayamaha, Nihal
Jayaraman, Raja
Julião, Jorge Manuel Soares Julião
Kandil, Omneya
Kaur, Arshinder
Kregel, Ingo
Lameijer, Bart
Laureani, Alessandro
Laux, Chad
Leseure, Michel
Leyendecker, Bert
Liu, Feng
Lizarelli, Fabiane
Luthra, Sunil
Maciąg, Justyna
Maldonado Rojo, Alejandro
Maleyeff, John
Mcdermott, Olivia
Mishra, Nandkumar
Mittal, Anuj
Mohd Yusof, Shari
Mulyono, Nur Budi
Naslund, Dag
Ojha, Ravindra
Osma, Alev
Pakdil, Fatma
Parida, Ratri
Parung, Joniarto
Pepper, Matthew
Powell, Daryl
Price, Oriana
Psomas, Evangelos
Rajagopalan, Jayaraman
Rathi, Rajeev
Rodgers, Bryan
Rodríguez, Denise
Rosa, Angelo
S, Vinodh
Sá, José Carlos
Sahoo, Saumyaranjan
Salentijn, Willem
Sampaio, Paulo 
Sana, Shib
Sarkar, Ashok
Shahin, Arash
Shokri, Alireza
Silva, Francisco
Simandjuntak, Sarinova
Simsekler, Mecit Can Emre
Singh, Bikram Jit
Singh, Jagdeep
Smith, Larry
Snee, Ronald D
Sony, Michael
Sreedharan V, Raja
Sreedharan, Raja
Stefanelli, Francesco
Sunder M, Vijaya
Susanty, Aries
Swarnakar, Vikas
T, Ramadas
Testik, Murat
Thomson, Scott
Tiwari, Sanjiv
Tjahjono, Benny
Tortorella, Guilherme
Upadhye, Nitin
Vaidya, Omkarprasad
Viles, Elisabeth
Wahjudi, Didik
Wibowo, Mochamad
Widyatmoko, Iswandaru
Wilson, William
Zabraee, Seyed