Global Presence
SIOR Certified
Working with Whitebox means you'll have a single point of contact with access to a global network of highly distinguished commercial real estate professionals through membership in the Society on Industrial and Office Realtors (SIOR).
36 Countries | 685 Markets | 50+ Regional Chapters |
3,000+ Professionals | 82,000 Transactions Annually


SIOR Facts
- SIORs did over $20 Billion in real estate transactions last year.
- Average SIOR broker has 25 years’ experience.
- Only 2% of commercial real estate license holders in the United States have the SIOR designation.
- SIORs have to be dealmakers. Requirements include 5 years in the business, and in Dallas-Fort Worth an SIOR has to have gross commissions billed of at least $450,000 in 3 of the last 4 years.
“SIOR is the gold standard for office and industrial real estate professionals. It is a privilege to achieve the designation, and it represents the best of the best.”
Office Locations
400 S. Record Street
Suite 1100
Dallas, TX 75202
420 Throckmorton Street
Suite 200
Fort Worth, TX 76102
510 Bering Drive
Suite 213
Houston, Texas 77057
501 Congress Ave
Suite 150
Austin, TX 78701
1200 G Street NW
Suite 800
Washington, DC 20005

Phone
214-380-4540 (Dallas)
817-502-1140 (Fort Worth)
713-589-2100 (Houston)
512-270-2295 (Austin)
202-370-1374 (DC)