Four-semester higher diploma delivering the knowledge, skills and mindset expected of a management undergraduate, covering management, marketing, accounting, operations, finance and leadership, with progression to B.Sc. (Hons) top-up degrees.

Two-year higher diploma in digital marketing with progression to the digital marketing management top-up degree.

External higher diploma in English following the Diploma in English; passing it qualifies candidates for registration to the BA External Degree.

Two-year higher diploma in English with progression to the BA (Hons) English top-up.

Higher diploma offered by the Department of Information and Communication Technology, available in weekday and weekend modes.

12-month (450-hour) higher diploma deepening practical microfinance knowledge and skills for the labour market, self-employment and progression to degree-level study. Held on Sundays at the campus.

Three-year Higher Diploma in Nursing offered by the SLIIT Faculty of Humanities & Sciences.

External higher diploma in Pali following the Diploma in Pali; passing it qualifies candidates for registration to the BA External Degree.

External higher diploma in Sanskrit following the Diploma in Sanskrit; passing it qualifies candidates for registration to the BA External Degree.

External higher diploma in Tamil language following the Diploma in Tamil Language; passing it qualifies candidates for registration to the BA External Degree.

One-year part-time higher diploma for those improving Tamil-language competence for employment, higher education and professional advancement, taught in 6-hour Sunday sessions.

Higher diploma in youth development offered through open and distance learning.

Established in 1943 as the National Diploma in Accountancy and transformed into the HNDA in 1946, this is Sri Lanka's oldest professional accounting programme. Per Public Administration Circular 46/90, the HNDA is considered equivalent to a B.Com degree from a UGC-recognised university. Completed full-time or part-time within a four-year period at ATIs island-wide.

A three-year, 101-credit programme (6 semesters of 15 weeks: 4 semesters of coursework plus 2 semesters of in-plant training) producing middle-level managers in crop and animal production, agro-product processing and agribusiness. Entry via Bio Science stream A/L passes plus O/L English and Mathematics.

TVEC-accredited NVQ Level 6 higher national diploma from the School of Agriculture, designed to produce middle-level technical personnel for the agriculture sector.