External Technical Services

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Learn about our screening process

4 Years In Business

Company Details

  • Verified Licenses


2313 North Henderson Avenue Unit 1237
Dallas, TX 75206


  • Mon: 7:00 AM - 4:00 PM
  • Tue: 7:00 AM - 4:00 PM
  • Wed: 7:00 AM - 4:00 PM
  • Thu: 7:00 AM - 4:00 PM
  • Fri: 7:00 AM - 4:00 PM
  • Sat: 7:00 AM - 4:00 PM
  • Sun: 7:00 AM - 4:00 PM
View All Details & Credentials


Service Details

  • Residential Work
  • Commercial Work
  • Small Jobs Welcome

Areas of Expertise

  • Landscaping & Sprinklers
View All Offerings and Cities Served

Cost Information

  • Free Estimates
  • Warranty Offered
  • Credit Cards Accepted


20 Verified Reviews*
  • 5
  • 4
  • 3
  • 2
  • 1

Highly rated for

  • Quality
  • Value
  • Customer Service
*Reviews imported from Google have not been individually verified by HomeAdvisor.
Showing 1-10 of 20 results
5.0 Donnie Richerson Google Review

We are extremely pleased with the quality of work provided by ETS and personal attention provided by the owner, Cullen Quinn. We originally engaged ETS in the spring to replace our double wide driveway with stamped, stained concrete. The detail provided in the estimate clearly explained the scope and dimensions of the work effort and addressed our expectations. The demolition, prep work and concrete pour took 3 days. The employees were hard working, polite and willing to answer any questions we had about was happening. Our new driveway is beautiful and really makes our home stand out. We have since had Cullen and his crew back for a few more projects. One to stain and seal our 20’ by 20’ patio in the backyard. The other to landscape the front and backyard gardens with added foliage, rock work and lighting. Again, the work was provided as promised and in a timely fashion. We will use Cullen and his ETS team again.

Response from Company:

Thanks guys, glad to hear it!

5.0 Olliver M. Dallas, TX

Cullen was a delight to work with. Friendly, great communicator, extremely responsive. Our project involved a stamped concrete patio, curbing/edging around planting beds, and some border walls of brick. We got good advice from Cullen. He and his team were very responsive to the mid-stream changes we made to the plan. Cullen returns phone calls promptly and does regular site inspections. We are very pleased with Cullen and External Technical Services (ETS). We are considering another project and are hopeful ETS will be able to help us.

5.0 Grant Busch Google Review

Cullen and his team at External Technical Services were great from project start to finish! They removed our wooden deck in the backyard and replaced with concrete patio - makes the area look amazing! The ETS team was on time, responsive, delivered a great product - could not recommend enough. 10 out of 10.

5.0 Laura Mccaskill Google Review

Cullen and the ETS team did an awesome job with our concrete patio extension, they demo'd the existing sidewalk, worked with us to match the existing look and advised modifications to our original plans that ended up making the final result look great. They were very responsive, on time and worked super quickly. Would definitely reach out again for future projects.

5.0 Christy Drake Google Review

Cullen was very easy to deal with and storage building was completed promptly and efficiently

5.0 Christopher Simms Google Review

On time and on budget. Great company!

4.5 Morgan Z. Dallas, TX

Very professional. Excellent crew.worked well as a unit.excellence attention to detail. The contacter was a true pro. When I was sick he even drove me to the drug store to pick up my meds. I truly appreciate and recommend this company. 5 stars from me.

5.0 Kelly B.

He did an excellent job. Professional and did what he said he would do outstandingly.

5.0 Jay G.

He built us a beautiful pergola we will love for years

5.0 Missy O. Lubbock, TX

Professional and easy to work with. We received quality work in a timely manner.


External Technical Services
German Schmear on House
Foyer and Bathroom Tile
Gateway Remodel
Landscape Install
Paver and Flagstone Jobs
Pergola and Paver Patio
Outdoor Kitchen Design
Driveway, Walks, Patio
Driveway and Sidewalks
Gallagher Patio Cover

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