In order to acknowledge our reviewers, who so generously dedicate their time to reviewing papers and demonstrate diligence, professionalism, and timeliness when reviewing manuscripts, MDPI journals regularly offer outstanding reviewer awards to scholars who participate in the peer-review process.

We are proud to recognize the winners for the year 2021 in the “Engineering” category for their outstanding contributions among extensive competition by presenting them with an Outstanding Reviewer Award.

We would like to take this opportunity to congratulate all of the winners on their achievement. MDPI will continue to provide support and recognition to the academic community.

Actuators:

• Ryszard Dindorf, Kielce University of Technology, Poland.

Applied Sciences:

• Khaled Giasin, University of Portsmouth, UK;
• Jakub Krzysztof Grabski, University of Technology, Poland;
• Marcos Tostado-Véliz, University of Jaén, Spain;
• Luigi Pugliese, University of Calabria, Italy;
• Francesco Bennardo, University of Catanzaro, Italy;
• Heriberto Perez-Acebo, University of the Basque Country UPV/EHU, Spain.

Biosensors:

• Amir Hatamie, University of Gothenburg, Sweden.

Buildings:

• Francesco Fiorito, Polytechnic University of Bari, Italy;
• Paul G. O’Brien, York University, Canada.

Chemosensors:

• Verónica Montes García, University of Strasbourg, France.

Machines:

• Piotr Gierlak, Rzeszow University of Technology, Poland;
• Sebastian A. Nugroho, University of Michigan, USA;
• Viorel Paleu, Gheorghe Asachi Technical University of Iasi, Romania.

Processes:

• Marcin Dębowski, University of Warmia and Mazury in Olsztyn, Poland;
• Bartłomiej Zieniuk, Warsaw University of Life Sciences, Poland;
• Zbigniew Nadolny, Poznan University of Technology, Poland;
• Attila Egedy, University of Pannonia, Hungary;
• Seok-Ho Rhi, Chungbuk National University, Korea.

Sensors:

• Hojong Choi, Kumoh National Institute of Technology, Korea;
• Li Fu, Hangzhou Dianzi University, China;
• Leonardo De Mello Honorio, Federal University of Juiz De Fora Juiz De Fora, Brazil;
• Mario Versaci, Mediterranea University, Italy;
• Robertas Damasevicius, Kaunas University of Technology, Lithuania.