 He worked at the winery in Rishon Letzion, where he met Israel Shochat, as a construction worker in Ben Shemen and a stonemason in Jerusalem.In 1907, he helped establish the first Jewish watchmen's organization, the clandestine "Bar-Giora".Two years later, in 1909, he was one of the founders of Hashomer, a Jewish defense organization, to safeguard the Jewish agricultural settlements in Palestine.