The interview process was smooth and the HR personnel were friendly. Dont be afraid to ask questions via email as they are very responsive.
The prelim interview was conducted by a Major. He was very welcoming and went beyond what normal interviews are like. He shared invaluable insights on what SCDF is about and what I as an individual can do to improve - I am grateful for his advice and his interview also reflected the organisation's culture when I joined too. You must however do your own research prior to the meeting. For example, read the career e-booklet or annual report.
The final round of interview is much more serious and corporate like, it is chaired by a Dir of HR and two other senior management. Don't be surprised if they grill you on your answers - keep calm and take deep breathes when you feel pressured - they want to know you can manage stress well. And most importantly, keep up to date with the world news and know why you want to join the organisation. They can sniff out when you are saying things for the sake of it and will call you out.
All the best!