According to a diplomatic cable released by Wikileaks, Switzerland has provided trainers to the Jakarta Centre for Law Enforcement Cooperation (JCLEC) but no other details are available.
Over the last two decades, Swiss arms companies have exported relatively small numbers of arms to Indonesia. Between 2006 and 2019, figures available on SIPRI indicate that Switzerland exported: 480 assault rifles, 210 submachine guns, 30 pistols, mostly to the Indonesian army.
Though the Swiss government doesn’t release data specifying which companies are exporting weapons, because of the relatively limited number of manufacturers in Switzerland it is possible to determine some manufacturers. For example, the only significant manufacturer of submachine guns in Switzerland is Brügger & Thomet.