Sullivan Commercial Realty is a full service San Antonio based, boutique brokerage firm specializing in the San Antonio and South/Central Texas market area.

Formed in 1996 with 100+ years combined experience in the commercial real estate market, our team is highly skilled in all aspects of commercial real estate brokerage – site selection, corporate services, office sales & leasing, commercial land acquisition & disposition including residential developments, master planned communities, institutional / corporate site selection, schools and industrial users.

Sullivan Commercial Realty currently manages and leases over 1,000,000 square feet of office, medical, retail and industrial space and represents several major land holdings within the San Antonio area.

Sullivan Commercial Realty takes pride in our ability to fulfill the most challenging requirements of our clients – the success of our clients is most important to us.  Our extensive experience enables our team to better manage and negotiate from an Owner’s perspective, with the goals of protecting and enhancing value.

Sullivan Commercial Realty’s local market presence, knowledge of our unique South Texas area, experience, expertise, marketing tools and personal attention offers our clients a distinct competitive advantage.

Sullivan Commercial Realty provides complete real estate solutions customized to meet our client’s specific needs:

  • Brokerage/Marketing Services
  • Client/Tenant Representation
  • Consulting
  • Property Management
  • Construction Management
  • Investments / Development


James E. Sullivan, Jr., President | Broker
210 341 9292 ext 304

Pete Tassos, Broker | VP of Sales & Leasing | Partner
210 341 9292 ext 303

Zach Davis, Broker | Associate – Sales & Leasing
210 341 9292 ext 309

Karrie Dziuk, VP of Brokerage & Marketing, Operations Manager | Partner
210 341 9292 ext 301

John Mansfield, Director of Property Management
210 341 9292 ext 310

Harold Shwiff, Senior Property Manager
210 341 9292 ext 307

Laura Serna, Property Manager
210 341 9292 ext 308

Jasmine Leal, Assistant Property Manager
210 341 9292 ext 302

Recent News

Sullivan NewsOak Hills Country Club Sales 10 Acres


Sullivan NewsCST Brands Moves Into New
Distribution Center Space


Abiso Development
llergy, Asthma & Immunology Assoc of South Tx
Alliance Residential
American Bank
Avant Development

Comal ISD
CST Brands, Inc
Davis-McCrary Family Property Trust
The Dermatology & Laser Center of San Antonio
Falcon International Bank
generations federal credit union
J3 Company
Meritage Homes
Oak Hills Country Club
Pediatric Digestive Care of San Antonio
Rausch Coleman Homes San Antonio LLC
Ricos Products Co, Inc.
Sage Western Companies
San Antonio Fire and Police Pension Fund
Schertz-Cibolo-Universal City ISD
Schroeder Interests
VIA Metropolitan Transit
Vise Oaks I, Ltd.