| Unit | Telephone Number | Fax Number |
|---|---|---|
| Director | +94 11 2669240 | sed.director@gmail.com |
| Entrepreneurship Development Unit | +94 11 2669236 | sed.entrepdevunit@gmail.com |
| Technology and Innovation Unit | +94 11 2665059 | sed.technounit@gmail.com |
| Marketing Development Unit | +94 11 2665058 | sed.mktdevunit@gmail.com |
| Business Consulting Unitt | +94 11 2669235 | sed.bizconsultunit@gmail.com |
| Financial and Supporting Service Unit | +94 11 2665292 | sed.financeunit@gmail.com |
| Research and Development Unit | +94 11 2669234 | sed.randunit@gmail.com |
| Admin and Human resources Unit | +94 11 2669233 | sed.admnhrunit@gmail.com |