The firm, headquartered in Tokoroa, serves industries such as pulp and paper, dairy, food processing, process manufacturing and petrochemical.
IVE operates from four locations: Tokoroa, Hamilton and New Plymouth in the North Island, and Christchurch in the South Island.
IVE employs 70 people and generated revenues of NZ$ 11.8m for the year ending in March 2013.
The deal builds on the acquisition of MIS Environmental and MIS Testing in the UK in September.