TMS has two main groups of committees: Administrative Committees and Technical Committees. Technical Committees report to the Technical Activities Committee (TAC), which reports on the progress of the Committees directly to the Board of Directors.
- Building Performance Committee
- Construction Practices Committee (CPC)
- Design Practices Committee (DPC)
- Earthen Modular Masonry Committee (EMMC)
- Energy Efficiency of Concrete and Masonry Systems Committee (EEC) — ACI/TMS 122
- Existing Masonry Committee (EMC)
- Existing Masonry Standards Committee (EMSC)
- Fire Resistance and Fire Protection Committee — ACI/TMS 216
- Gravity Retaining Wall Committee (GRW)
- Investigating Disasters Project Team (ID)
- Research Committee
- Technical Activities Committee (TAC)
- Technology Committee (TC)
- TMS 402/602 Building Code Requirements and Specification for Masonry Structures Committee
