This Study On Assessment Of Progress In Capacity Building Of HIV/AIDS Supply Chain Workforce In Nigeria Included Research Objectives, Questions, And Hypothesis. A Pre-Tested Self-Completion Structured Questionnaire Was Administered To Participants (422) With A Response Rate Of 396 (93.8%). The Reliability Statistics Showed The Questionnaire Is Less Reliable (Α = 0.237). Notable Progress Includes Donor Agencies Interventions Contributing Considerably To Capacity Building Of Government Personnel And Adequate Capacity At The National Level 396 (100.0), The Institutionalization Of Capacity Development At All Levels Through National Product Supply Chain Management Programme, Procurement And Supply Management Technical Working Groups, And Logistics Management Coordinating Unit 292 (73.7) And Demonstrable Capacity In Key Supply Chain Functions 259 (65.4). The Study Revealed Substantial Progress In Capacity Building Of The HIV/AIDS Supply Chain Workforce, Evident With The Institutionalization Of Capacity Building And Demonstrable Capacity In The Key Supply Chain Functions. More So, Master Trainers From The Government Are Not Always Part Of The Facilitators And Involved In Capacity Building, Needs Assessment Does Not Always Precede Capacity Building, The Inadequate Pool Of Master Trainers, Fellowship Training Program Is Not Recognized, And Pre-Service Training Has Not Been Institutionalized. Chi-Square Statistics Revealed That The Extent Of Progress In Capacity Building Is A Significant Factor Of HIV/AIDS Supply Chain Workforce Capacity (P<0.05). There Is A Need To Develop Manuals, Policies, And Procedures To Ensure Sustained Progress In Capacity Building, Needs Assessment Precedes Capacity Building, More Training Conducted To Ensure An Adequate Pool Of Master Trainers In The Public Sector And Their Participation In Future Capacity Building Interventions.