Geac Computers has acquired Praxa's Local Government Divisions in Australia and New Zealand.
Almost all of the 40-odd affected staff have been transferred, with no reported job losses.
Praxa is a broad-based systems integration company with 500 staff. It supplies local government enterprise resource planning (ERP) software and related services in Australia and New Zealand.
Customers for Praxa's GEMS client server software include large local bodies, including those in Christchurch, Dunedin, Greater Geelong and Ballarat.
The former Praxa division employed 27 in Auckland city centre, who will be transferred to Geac's Grafton headquarters.
Fifteen Australian staff transfer from Praxa to Geac, while four to five move to another Praxa division.
Geac Asia-Pacific managing director Graeme Riley says the company will integrate the divisions activities and employees into the local government activities of Geac, along with their products.