After visiting Tatu City, Gallagher chair and chief executive Sir William Gallagher said he was impressed by the project.
Gallagher was providing monitored pulse fences for Tatu that integrated with video and biometric monitoring systems as well as turnstiles which controlled entry and exit.
Some of the fittings and electronics being used in the project was being manufactured in Hamilton, Sir William said.
He hoped that Gallagher would be involved with Rendeavour's six other developments of city-like precincts in other parts of Africa.
The work could be worth "millions in due course" to Gallagher, Sir William said.
Jennings in a statement said he was delighted to be working with Gallagher, which he said was a "household name in dozens of countries around the world".