| Acronym | Definition |
|---|
| SESI➣Servico Social da Industria (Brazil) |
| SESI➣Solar Energy Society of India (est. 1976; International Solar Energy Society) |
| SESI➣Science and Engineering Services, Inc. (various locations) |
| SESI➣Superior Energy Services, Inc. (various locations) |
| SESI➣Systems Engineering Solutions, Inc. (est. 1987; Dunn Loring, VA) |
| SESI➣Social Entrepreneurship Summer Institute (Illinois) |
| SESI➣Systemes d´Enseignement Superieur et Innovation (French: Systems of Innovation and Higher Education) |
| SESI➣Shipboard Explosive Safety Inspection |