Team Jets assistant Debbie Pitman's decision to leave is a "big blow" to the Jersey netball club, according to head coach Linda Andrews.
Pitman has been alongside Andrews since the island side was set up in 2011, and has helped them progress from regional netball to Premier League Two.
"She just wanted some time out," Andrews told BBC Jersey.
"I've worked with Debbie for too many years to count and she's always been my right-hand man."
Jersey have moved from Les Ormes and will play their home games at St Helier's Fort Regent leisure centre this season as they embark on their first campaign in the second tier of English club netball.
"A lot more's been put on my shoulders," added Andrews.
"But hopefully we've got a team of coaching staff around us and we've just got to get on with it, but she will be a great loss.
"I've got good team now and Chrissie Foster and Maureen Cox have stepped up to the senior Jets to help me, so they'll be doing sessions with the girls."