ASM International, Worcester Chapter
- Serves local members predominantly from central and western Massachusetts. Based in Worcester County, the chapter currently has over 250 members in fields ranging from metals supply to research and covers products from forgings to microelectronics.
- http://www.asm-ma.org/

APWU Central MA Local
- Union serving postal workers throughout Central Massachusetts.
- http://www.cmal-apwu.org/