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SIOR Designee
Representing the elite top 1% of commercial real estate professionals, SIOR designees are recognized for their exceptional production, experience, and commitment to the highest standards of ethics and excellence. Designees specialize in industrial, office, sales management, executive management, and advisory services.
Member Associate
Commercial real estate professionals with 1–8 years of industry experience who are building their careers and working toward earning the prestigious SIOR designation through education, mentorship, and networking opportunities.
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Companies providing products and services to the commercial real estate industry seeking to build relationships, increase visibility, and connect with SIOR’s elite global network of professionals. You may also use the following link to search our Affiliate Members.
Diana C. Whisenant
Executive Managing Director
HANNA COMMERCIAL REAL ESTATE
SIORSIOR Member since 2011
Brokerage Management, Consulting, Corporate Services, Distribution & Logistics, Landlord, Sale/Leasing, Tenant Representation1350 Euclid Ave Ste 700, Cleveland, Ohio 44115-1889
About
Diana manages the corporate real estate department at Hanna Commercial. Her team specializes in transaction management for corporate clients. This includes global portfolio management, strategic consulting, site selection, property acquisitions and dispositions. The
overarching goal is to create transparency and centralize the real estate portfolio, eliminate legacy
issues, and implement cost-saving strategies. Her experience living and executing transactions
abroad makes her well suited to partner with multi-national fi rms seeking expert advice on critical
cross-boundary real estate decisions.
Diana is a licensed commercial real estate salesperson in the State of Ohio, assisting owners
and tenants with site selection, leasing activity, property sales, acquisitions and investment
transactions.
Active Committees (2)
- Board of Directors
- Women's Leadership Group
Past Committees (1)
- Board Members-At-Large
Events Attended This Year (2)
- SIOR'S Fall 2026 Event
- 2026 Spring Event
Lifetime Events Attended (13)
- SIOR'S Fall 2026 Event
- 2026 Spring Event
- 2025 Fall Event
- 2025 Spring Event
- Fall 2023 Event
- 2023 Spring Event
- Women’s Leadership & Mentorship Networking Zoom (March 17, 2021)
- Women’s Leadership & Mentorship Networking Zoom (February 17, 2021)
- 2018 Spring World Conference
- 2017 Spring World Conference
- 2015 Spring World Conference
- 2011 Fall World Conference
- 2008 Fall World Conference - Minneapolis, MN
