Rigorous peer-reviews are the basis of high-quality academic publishing. Thanks to the great efforts of our reviewers, Eng was able to maintain its standards for the high quality of its published papers. Thanks to the contribution of our reviewers, in 2021, the median time to first decision was 24 days and the median time to publication was 45 days. The editors would like to extend their gratitude and recognition to the following reviewers for their precious time and dedication, regardless of whether the papers they reviewed were finally published:
| Alberto M. Pernía | Mohammad Nooraiepour |
| Aleksander Tedstone | Muhammad Ajaz Ahmed |
| Alessio Bucciarelli | Nikolai Tsvetkov |
| Alice Berardo | Olga A. Azarova |
| Andrey V. Filippov | Orlando M. N. D. Teodoro |
| Aris Giannakas | Pavlos S. Georgilakis |
| Catherine Kelly | Petar Varbanov |
| Chandarasekaran Ramamurthy | Quynh Thi Tu Tran |
| Cristian-Dragoş Dumitru | Rafael J. Bergillos |
| Davide Rocco | Renata Włodarczyk |
| Eugeniusz Koda | Rosa Veropalumbo |
| Eva Díaz | Shingo Yokota |
| Gabriela Lisa | Siyuan Ji |
| Hassan Elahi | Stefania Garzoli |
| Jana Sedlaříková | Subramanian Sundarrajan |
| Jen-Yuan (James) Chang | Tomeu Rigo |
| John Radcliffe | Travis W. Knight |
| José Fortes Lopes | Viktors Haritonovs |
| Josef Guttman | Virgil Florescu |
| Kelin Hu | Vladimir Răsvan |
| Kristina Ložienė | Vladimir Vasilyev |
| Luc Pastur | Wahid Ferdous |
| Marco Monti | Wojciech Smułek |
| Mark James Jackson | Wongi S. Na |
| Mihaela Morega | Zbyněk Sokol |
| Miroslav Pospíšil |
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