The former St George Illawarra player and coach made a big impact on his first Super League club, taking the Giants to Wembley and within 80 minutes of a maiden Grand Final in his four years at the John Smith's Stadium, and is expected to bring back the trophy-winning days to St Helens.
"A lot of coaches would like to have this job," said Brown, who has signed a three-year contract. "Obviously it's a club with a lot of good tradition. They've been very successful for a long time. You feel privileged to have a job at such a strong club. It's a lot like back home - everybody loves rugby league."
The spotlight will be on the 39-year-old Australian when he goes up against his old club in next Saturday's round one Super League clash at Langtree Park, but he is not looking back.
"All clubs are different," he said. "It would be very unfair to compare St Helens and Huddersfield.
"We had a great time at Huddersfield. I think we were a good fit for each other for a period of time.
"Now we move on. This is a different type of challenge."