Building Trust Since 1923...

Over the years, Alterman has provided electrical construction on many impressive landmarks and contemporary structures in San Antonio, Austin, and the surrounding areas. By integrating cutting-edge technologies with core values and disciplines, Alterman has successfully met the expanding needs of commercial and industrial clients and has earned the confidence of Owners, Construction Managers, General Contractors, Architects, and Engineers. We are an EC&M Top 50 market-leading electrical contractor focused on safety, quality, and customer satisfaction with a strong commitment from our employee-owners to excellence throughout the organization.

Alterman provides complete installation expertise, 24/7 service, in-house design/build, Building Information Modeling (BIM) and fast-track construction for a wide range of electrical needs, as well as voice and data communications systems, video, access controls, security and surveillance systems and alternative energy solutions for LEED certification.


For over 96 years, Alterman has been providing electrical construction services safely, on time and on budget for some of San Antonio and Austin’s largest and most complex projects. With a large staff of highly trained and dedicated employees, Alterman is committed to providing safe, quality, and dependable service to satisfy your needs.

Alterman’s design/build, design/assist, and cost value assessment services distinguish us from our competitors. Alterman’s early participation facilitates fast-track schedules and allows construction to commence before completion of design documents. By evaluating the Owner’s unique project requirements, Alterman recommends cost-effective, quality-enhancing solutions that extend electrical system life cycles and lowers operating costs. Our breadth of experience, comprehensive project historical cost databases, and accurate pricing results in the development of prompt and realistic budgets.


Alterman is not just a “Big Job Contractor”; our Special Projects Division specializes in electrical construction work on all size of projects. Staffed with a dedicated group of Project Managers, Engineers, and field electricians, we provide the same level of unyielding dedication and commitment to our medium and smaller electrical construction projects.

From a small renovation to a multimillion-dollar Datacenter, Alterman has the experience, financial strength, management competence, and field installation workforce needed to ensure the successful completion of your project; safely, in budget and on schedule.


Alterman’s Building Automation and Controls Division serves as the prime subcontractor to national and local equipment control system manufacturers/integrators, as well as area mechanical contractors installing the electrical distributed control systems that are used to control and monitor a building’s heating, cooling, and ventilation (HVAC) system. Modern building automation systems also control indoor and outdoor lighting, security, fire alarm, and other related low voltage systems that are part of an integrated Building Management System. Our Building Automation & HVAC Controls Group consists of a large group of highly skilled and trained electricians, as well as low voltage technicians. When it comes to installing your equipment, you won’t find a more qualified group.

  • Air handlers/Roof-top Units/Wiring
  • Boiler/Chiller Controls
  • Sensor Placement/Installation/Wiring per Designs
  • Startup/Commissioning Assistance
  • Pneumatic/DDC Systems (new or renovation)/Upgrades
  • Surgery Monitoring Controls/Medical Gas Alarms
  • Fume Hood Controls
  • Upgrading Existing BAS Systems
  • K-12
  • Office Buildings/Commercial
  • Health Care Facilities
  • College/Universities
  • Performance Contracts
  • Complete Conversions/Renovation
  • Research Laboratories
  • Industrial/Production
  • Water and Wastewater Plants
  • Water Parks
  • Hotels



Electrical Contractor License Number: EC17043