The explorer has also appointed exploration managers for Ghana (Iwan Williams) and Cote d'Ivoire (Moctar Keita).
The company is looking to develop lithium and gold deposits in Chad, Ghana and Cote d'Ivoire.
Chairman Neil Herbert said the management picks would help move IronRidge down the development path.
"We are delighted to have secured the continued services of Vincent and Len, who have both been paramount in the development of the company to date," he said.
"We believe they will continue to make a significant contribution to the company's efforts to both strengthen and rapidly develop its project inventory."
IronRidge also appointed Steve Cancio-Newton has principal geologist, based in Brisbane.