Diane Nossem is a Proposal Manager on the U.S. Sales Enablement team for Avison Young based in the Chicago office. She supports new business pursuits for single and multi-market accounts with Brokerage, Property Management, Technology, Flexible Office Solutions and the Professional Services teams across the U.S. Diane serves as writer, editor, and project manager on the team. Her career as a strategic communicator began more than 30 years ago, progressing from customer-focused administrative and operational support and management into marketing and communications project management, specifically responsible for proposal response preparation and submission since 1999.

Prior to joining Avison Young in 2024, Diane has held multiple roles including proposal manager and marketing manager, specializing in writing, editing, publication design, project management, program management, brand management, client communications and internal communications. Industries in which Diane has experience include global investing, global manufacturing, human resources, healthcare and construction management. 

Diane serves as a board member of the American Red Cross of Northwest Indiana and chairs the philanthropy committee.  She earned a Bachelor of Arts majoring in English from DePaul University.