Sergeant Mohammad Shafiq Iskandar works at one of the world's busiest land checkpoints - and he's proud of it.

Despite the odd and long hours spent working at the Woodlands Checkpoint, Sgt Shafiq said that it's an honour to be trusted with keeping Singapore's borders safe.

The 28-year-old, who is married and whose wife is four months' pregnant, is an image analyst with the Z Backscatter Van, a white van equipped with X-ray capability to scan vehicles for abnormalities such as hidden contraband or people.

Sgt Shafiq, who has been with the ICA for three years, said his job exposes him to radiation but he feels it's a risk worth taking.

He explained: "We wear a tag that keeps track of the level of radiation we are exposed to and it gets checked every three months. If it's over the limit, we have to rest for two months, but that hasn't happened to me yet.

"It's a risk worth taking, to protect my home and my loved ones."