In this contemporary world, when there is a drastic shift in the demographic features of the workforce, understanding millennial workers' expectations of work becomes an important agenda for the continuity and success of the company. Outside Indonesia, researchers found millennial workers wanted to have high salaries, comprehensive benefit packages, rapid career development opportunities, as well as work location that is near to where they live (Robert Half International and Yahoo! HotJobs, 2008), personal life and an opportunity to grow (Baldonado & Spangenburg, 2009), and career advancement opportunities, and work-life harmony and good relationships with colleagues (The GMP Group & Temasek Polytechnic, 2009). In Indonesia, Sitepu (2012) found nature of the job, supervision and promotion opportunities as three main factors that made millennial workers stay at work. This study was carried out to enrich the findings above, focusing on millennial workers in Jakarta, a big city of Indonesia. The findings are: 1) simultaneously eight occupational factors which are Salary, Benefit, Promotion Opportunities, Supervision, Relationship with Colleagues, the Job Itself, Job Flexibility, and Work Location positively and significantly affected Organisational Commitment, and 2) only four factors (benefits, promotion opportunity, work flexibility and work location) partially affected the Organisational Commitment positively and significantly.