Prompt & Professional Electricians in Round Rock, TX

Group Photo

SALT Light & Electric (formerly RSM) was formed in 1984. We started out small but strong-minded, performing parking lot lighting maintenance and repair. Kathleen and John McCarthy acquired this company in 2008. They expanded the company to include electrical contracting services, new construction, remodeling, and sign installation and repair.

Our commitment to customer satisfaction and community service, combined with prompt, professional service, has been rewarded with strong growth in our business. SALT has been certified as a Historically Underutilized Business (HUB) by the state of Texas. We represent the best of Central Texas when it comes to residential and commercial electrical and lighting service.

Apprentices are trained at the Central Texas Chapter of the Independent Electrical Contractors (Centex IEC), the premier education, training & mentoring program for contractors & electricians.


SALT Light & Electric Team - Electrician Repair Austin Texas

Meet The Team

Kathleen McCarthy, President & Owner

Kathleen boasts extensive experience in aviation, finance, transportation, and the construction industry.  She enjoys building our brand, marketing, and giving back to the community through SALT and church.  Her greatest passion is her 10 grandchildren, and is more than happy to tell you about them!


John McCarthy, CFO & Owner

John has 34 years of management experience in areas of finance, transportation, aviation, and construction.  He enjoys the challenges of owning, operating, growing, and leading SALT to become the best in the industry.  John loves playing racquetball, golf, and sailing.  He also enjoys reading, his 10 grandchildren, and his wife of 39 years, Kathleen.

Justin Garza, Director of Commercial Services & Director of Plant and Equipment

Justin has 14 years of project management experience in the electrical and construction industry.  His focus at SALT is to build our commercial service department into a world-class organization ensuring commitment to our customers’ expectations.  Justin loves spending time with his wife and 3 children, BBQing, playing golf, and watching football, Hook ’em!

Brendan, Director of Residential Service

Brendan has 14 years of experience in the electrical industry, moving from a lighting technician to an electrical, hydraulic, and mechanical instructor for pressure control equipment in the oilfield.  When he’s not busy delighting our clients, Brendan loves spending time with his wife and two girls, playing soccer, golfing, BBQing, and supporting the Austin FC, Verde Listos!

Melina Garza, Director of Business Management

Melina LOVES all things SALT.  Her focus is the care department, marketing, recruiting, and building SALT’s culture to be salt and light to the world around us.   She loves people, especially our team members and is always found with a big smile.  Outside of SALT, she is actively involved with her church, her husband Justin and 3 children, cooking, hosting get-togethers at her home, and spreading awareness for her daughter’s rare condition.

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Why Choose SALT Electricians?

Prompt & Professional – When it comes to electrical work, you need to be able to trust your contractors. With SALT you’ll never have to worry about the character of our people or the quality of our workmanship. All work is done on time and on budget. Our team of Electricians are fully trained, licensed, and certified. We guarantee superior service.

Family Owned & Operated – We began in 1984, determined to build a professional electrical contracting business in Central Texas. Now with decades of experience under our belts, we look back to our humble beginnings with great pride. We’re loyal to our customers and our community.

Giving Back – We take giving seriously. As a growing business, we feel blessed to be in a position to give back to the communities that have supported us over the decades. We began the Light the Steeple Project as a way to help our area shine bright. Each year, SALT donates the materials and labor needed to install steeple lights for a deserving Central Texas church. We are always looking for new ways to give back to the communities that give us so much.

Recycling – At our Pflugerville location, you will find supply and service certified recycling barrels for fluorescent and HID lamps and ballasts. Many people don’t know how to dispose of their electrical items properly. Feel free to contact SALT for further information on our recycling program.

Our Services

We specialize in 6 main categories of services:

1. Electrical Services

  • Circuit Breakers & Fuse Boxes
  • Switches, Outlets & Dimmers
  • Smoke & CO Detectors
  • Ceiling Fans
  • Troubleshooting
  • Wiring & Rewiring
  • Inspections
  • Data & Networking
  • Generator Install
  • Electric Vehicle Charging Station Installation

2. Lighting Installation, Repair and Upgrades

  • Interior & Exterior
  • Security Lighting
  • Sign Maintenance
  • Switches, Outlets & Dimmers

3. Fan Installation and Repair

  • Bath Exhaust Fan Install
  • Bath Exhaust Fan Repair
  • Ceiling Fan Install
  • Attic Fan Install
  • Attic Fan Repair

4. Landscape Lighting

  • Outdoor Lighting Plan & Install
  • Outdoor Light Repair

5. Retrofits

  • Remodeling & Construction
  • Home Addition or Remodel Electrical Installation
  • Electric Wiring Upgrade

6. Repair

  • Commercial & Residential

The Story Behind the SALT Name

How did we come up with the name SALT for a lighting and electrical company? Well, there’s a story behind that.

We were intrigued by science. Did you know that you can create electricity yourself with salt water? Additionally, the name has a connection with our mission statement and our belief in Christian Values. We want to be salt and light in the world.

How to make electricity with SALT water

You can make an electrical circuit using ordinary salt water. It works because water pulls salt’s sodium and chlorine ions apart, allowing you to harness their electrical charges. You can make your own SALT water circuit by gathering together just a few household items.

What you need:

  1. Cup or beaker
  2. Water
  3. Salt
  4. Masking tape
  5. Insulated copper wire
  6. 9-volt battery
  7. Miniature low-voltage light bulb
  8. Aluminum foil
  9. Popsicle stick or tongue depressor
  10. Pair of wire strippers
  11. Scissors


Step 1 – Wrap the two popsicle sticks or tongue depressors in aluminum foil, which will act as the electrodes.
Step 2 – Cut 3, 6-inch pieces of copper wire with scissors and then use the wire strippers to strip a ½-inch of insulation off each end.
Step 3 – Connect one of the wire ends to the positive terminal of the 9-volt battery, holding it in place with masking tape. Connect the other end of the wire to the light bulb socket by wrapping it around the bottom of the bulb, and secure with tape if necessary.
Step 4 – Take another wire and connect it to the light bulb. Then tape the other end to the tope of one of the electrodes.
Step 5 – Take the last piece of wire and connect it to the negative terminal of the battery and the top of the other electrode to complete your circuit.
Step 6 – Pour a cup of water into a beaker. Stir in a teaspoon of SALT until dissolved.
Step 7 – Put the electrodes in SALT water, and don’t allow them to touch.
The Payoff… The light bulb will light up!

For professional commercial and residential electrical services in Travis County, Williamson County and the surrounding Austin area, contact SALT Light & Electric at (512) 956-7842 or schedule an appointment online 24/7.