This volume contains the proceedings of the 2nd International Conference "MECHANICAL ENGINEERING SOLUTIONS: Design, Simulation, Testing, Manufacturing" (MES-2025), held on September 17–19, 2025 in Yerevan, Armenia, under the patronage of IFToMM.

The contributions highlight recent advances in key areas of mechanical engineering, including linkages and mechanical controls, robotics and mechatronics, engines and powertrains, gears and transmissions, transportation systems, vibrations, rotordynamics, and biomechanical engineering. Selected papers also cover educational methods and historical developments in the field.

Emphasizing practical relevance, this book showcases innovative engineering solutions—from novel design concepts and simulation techniques to optimized control strategies and enhanced mechanical characteristics of existing machines.