"Pedro is a very professional Structural Engineer. Very knowledgeable."

"The understanding was that he would provide everything we needed to begin construction. We hired a firm in Dallas to survey our property so that Dave could begin his design. The survey cost $500. Dave's designs are detailed and easy to read/understand. Before we agreed to do business with him, Dave told us he expected to have to change the plans several times as that was typical. We told him up front that we had two different options we were considering and he told us he would produce both options for our contractors to quote. The plans came to us with the wrong address listed, not a big deal but worth noting because the city will not accept them like that. We ended up going with the cheaper build and had to tweak it a few times due to Garland's codes. Also, not a big deal but it was at this time that Dave started complaining about how much work he was having to do for us. The ultimate complaint, and the reason why I will not use or recommend Dave's services came after we FINALLY submitted the plans to The City of Garland. They told us that they would not accept them without an engineers' stamp. I called Dave to ask about this and he recommended a couple of engineers but NONE of them would stamp plans that they did not design. We networked our own engineers and they all said the same thing. So we were left with a $5,000 pile of paper. We ended up not doing the addition because we would have had to draw a larger line of credit that we budgeted for. In conclusion, if you are building in a city that requires and enforces code compliance DO NOT USE O'Brien, find an engineer you trust and make sure they stamp the plans."

"He was very professional and insightful about the foundation and the slight slope I did not notice until he pointed it out will use him again."

"Great people to work with from the owner to the designers."

"I am general contractor They did three different job for me. Their work was good. The price was reasonable and on time."

"I hired them to create plans for an apartment building. The process was quick and painless. Cost was good. The plans are full complete abd ready to take to builders for quotes. I will definitly use them again."

"Prompt and professional service. Detailed drawing provided of structural alterations needed to support kitchen remodel."

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We’re a family owned and operated company that values honesty and integrity, and stands behind our work. We offer over 40 years of industry experience. We specialize in Asphalt Shingle Roofing installation, replacement, and repairs. Our services are customized to the individual project, paying close attention to the details of each project that we're involved with. We look forward to building long-term relationships with our clients and guarantee your satisfaction!