Lariviere, the district's director of child development programs, Head Start and state preschool programs, completed her last day with Pomona Unified Tuesday.
Wednesday she began working for the Inglewood Unified School District as the new assistant superintendent of educational services.
Lariviere, who had been with Pomona Unified since 1977, was invited to take the position with Inglewood in early November, she said after Tuesday's meeting.
Inglewood's leaders ratified her hiring Nov. 14, Lariviere said.
Pomona Superintendent Richard Martinez said Lariviere started out as a teacher with the district and worked her way up and along the way mentored teachers and administrators.
"I'm one of those you have helped out along the way," he said.
Lariviere thanked board members, district staff and colleagues.
"Pomona for me is a family," she said. "You have allowed me to learn. You have allowed me to grow, to flourish and experiment."
Pomona Unified gave her the freedom to develop as an educator and to take what she learned and share it with others, she said.
Martinez said Lariviere's responsibilities will be taken over by Stephanie Baker, deputy superintendent of instructional services, and Leslie Barnes, assistant superintendent for business services and chief financial officer.
Baker will handle the instructional component and Barnes will address the financial component for the next two months with the program personnel Lariviere left in place reporting back to the two administrators, Martinez said.
This arrangement will allow district administrators to determine if a replacement for Lariviere will need to be hired or if the early childhood education programs can function effectively without hiring an administrator and achieve some savings for the district, he said.
If an administrator is needed "the board of education is very much open" to hiring one to fill the positions Lariviere once held, Martinez said.