He will report to CEO Kevin Kennedy and will work to drive global initiatives through analyst relations and strategic alliances, the company said.
Previously, he spent 19 years at Cisco Systems, where he most recently served as vice president of sales and operations for global enterprise.
In that role, he managed sales, support and field operations for the company’s global industries clients segment.
He also worked at IBM for 11 years in positions of increasing responsibility.
Earlier this year, Avaya named four new executives to its senior executive committee, which Allard will join.