Pay: $17 per hour
Mr Keith Low, 18, loves dogs.
The final-year student at Hwa Chong Institution has been a dog-walker for the last two years.
He has walked german shepherds, shetland sheepdogs and terriers.
Even with his A levels looming, he continues to help another family walk their golden retriever, Simba, once a fortnight.
He says: "If I don't walk Simba, it will feel restless and won't get enough exercise.
"Dog walking also lets me take my mind off books and is good exercise for me."
When his school holidays start, Keith will walk two dogs every week.