Introduction: A training needs assessment (TNA) was conducted by the Department of Science and Technology, Food and Nutrition Research Institute (DOST-FNRI) to design appropriate and relevant trainings for Municipal Nutrition Action Officers (MNAOs). In the Philippines, MNAO is a nutrition officer who serves at the municipal level and is tasked to ensure the localisation of the Philippine Plan of Action for Nutrition (PPAN) in Local Government Units (LGU) to ensure proper implementation of activities on Public Health Nutrition (PHN). Methods: A total of 162 MNAOs in the country answered the online TNA survey conducted from April to May 2023. Results: Based on the results of the TNA survey, there was a need for DOST-FNRI to design and conduct trainings related to the top three core competencies identified by MNAOs: Creating policies and standards related to food and nutrition; advocating legislation, regulation, and nutrition policies; and designing appropriate nutrition information education and communication (IEC) materials. Conclusion: Based on the study results, it is recommended that LGUs allocate funds for capacity building of the public health workforce to create a skilled workforce in the community that will coordinate the formulation, implementation, monitoring, and evaluation of nutrition plans at the municipal level. For future consideration, curriculum design for professional development in public health nutrition should include core competencies on food and nutrition policy programme, nutrition programme management, and IEC development.