Webster joined the Eels in the 2013 pre-season, following stints as an Assistant Coach for the Wests Tigers NYC squad and UK Super League club Hull KR.
"I'm going to miss the players; them as people and their ability. For me, I think they're all fantastic young men, and I couldn't have asked for a better staff in the NYC group, as well as the NRL coaching staff," he said.
"I learned a huge amount from them, and I will also miss everyone in the office, from Marie in reception through to Denis on the BBQ."
"I'd like to thank everyone at Parramatta for the way they took me in; they made me feel really welcome, and for all the fond memories, good times and making it such a special place."
Andrew says he's excited to return to the Wests Tigers, after playing his junior football there.
"I was a Wests Tigers junior, and I coached the SG Ball side and was assistant NYC coach there in 2012 and won both premierships there, so returning there is a nice feeling," he said.
"There are a lot of people at the Tigers who I have similar friendships that I have here at the Eels, and I'm looking forward to working with their playing group as well."
The Pirtek Parramatta Eels NYC team finished 14th in 2013 and provided the platform for 5 players to make their NRL debuts this season Kelepi Tanginoa, Vai Toutai, Junior Paulo, Kaysa Pritchard and Joseph Ualesi.
Pirtek Parramatta Eels Interim CEO Matt Phelan today thanked Webster for the contribution he has made to the club.
"Whilst Andrew was only with the Eels for 12 months, his impact cannot be questioned with 5 NYC players making the step up to first grade this year," Phelan said.
"He has been given the opportunity to return to the club where he grew up and we wish all the best for the future."