This study aimed to develop a structural equation model for ICT competency in administrators affecting school administration and propose implementation guidelines. The research involved two phases: model development and focus group discussions for guideline formulation. The sample included 310 educational administrators and department heads from secondary schools under the Songkhla and Satun Secondary Educational Service Area Office. A questionnaire was used as the primary research instrument. The findings showed the developed structural equation model had an excellent fit with empirical data (Chi-Square=188.4, df=166, p-value=0.11, GFI=-.95, NFI=0.97, TLI=0.99, CFI=0.99, RMSEA=0.02, RMR=0.00). A key finding was the significant positive direct influence of the competency to appropriately use and manage ICT for education and work performance (influence coefficient = 0.66, p < 0.01). Overall, the ability to use, manage, promote, and support ICT legally, ethically, professionally, appropriately, and safely for administrative improvement collectively explained 72% of the variance in educational institution administration. Recommended guidelines for applying the model include organizing workshops, developing ICT strategic plans, creating learning networks, establishing Professional Learning Communities (PLCs) for administrators, and setting ICT competency indicators. These measures are expected to boost administrative efficiency and quality, aligning with current Ministry of Education policies.