About your Birmingham tenant rep
Sandner Hennessy, SIOR — Birmingham office tenant representation
Partner, Director of Occupier Services · Colliers | Alabama

Sandner
Hennessy, SIOR
Partner, Director of Occupier Services
Professional Summary
Sandner Hennessy specializes in office tenant representation in the Birmingham market. With a background spanning brokerage, real estate valuation and strategic property positioning, he brings deep industry knowledge to every client engagement. Since entering commercial real estate in 2011, Sandner has worked across multiple states in the Southeastern United States for a diverse clientele that includes financial institutions, pension funds, REITs, developers, private property owners and law firms.
Before joining Colliers, Sandner was a licensed commercial real estate appraiser focused on Class A office buildings, medical office space, and power and lifestyle shopping centers. He began his professional career as an accountant at Ernst & Young.
That valuation background is the advantage he brings to tenants: he knows how owners and lenders underwrite a building, what a landlord can afford to give on rent, free rent and tenant improvements, and how to compare proposals on true total occupancy cost.
Sandner holds both a Bachelor of Science and a Master’s degree in Accounting from The University of Alabama in Tuscaloosa, and he is a Certified General Appraiser. Active in the community, he is a member of the Monday Morning Quarterback Club and the Venture Club, and serves on the board of the Birmingham Golf Association.
What Sandner does for tenants
- Tenant representation for relocations, renewals, expansions and subleases
- Birmingham office market surveys across the CBD, Hwy 280, Midtown, Southside and suburbs
- Proposal analysis and lease negotiation through signature
Meet Our Team
We bring extensive experience, a clear focus, and the full resources of the Colliers platform.

Sandner Hennessy, SIOR
Partner, Director of Occupier Services
Point of Contact

Joe Sandner, III, SIOR
CEO | Alabama
Point of Contact

Alison Waddell
Director of Marketing

Dennis Lengsfeld
Financial Analyst

Stacey Williams
Sr. Brokerage Coordinator

Hannah Lucas
Financial Analyst
The Colliers Advantage
- 3rdLargest Real Estate Company
- Services at every stage of the process
- Multi-market intelligence pushing local landlords outside of “market norms”
- Real Estate Professionals23,000
We are the most experienced, have the most focus, and provide access to the powerful Colliers platform!
The Most Experience
42 occupiers represented by the team · 1,721,329+ SF combined
Square footage as reported in Colliers | Alabama client materials; Altec shown as +100,000 SF and counted at 100,000 SF in the total.
About this site
birminghamtenantrep.com is Sandner’s tenant-representation site for the Birmingham office market. Building data in the Class A directory is coordinated with Birmingham Rent Roll, a private market dataset Sandner maintains. Colliers also represents some landlords in Birmingham; any such relationship on a building you’re considering is disclosed up front.
Leasing office space in Birmingham?
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