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Brown Sims: A 1968 Two-Man Maritime Shop That Grew Into a 65-Attorney Defense Firm

Origin and Background

Thomas A. Brown left the U.S. Navy after the Korean War to attend the University of Texas School of Law, joined the Houston firm now known as Fulbright & Jaworski in 1957, and spent the following decade focused on maritime and energy law. G. Byron Sims, the son of a port engineer for the Keystone Shipping Company, graduated from the same law school in 1967 with maritime industry knowledge of his own. The two formed Brown Sims as a two-man firm in 1968 to serve Gulf Coast maritime and energy clients, and by 1986 had expanded into construction, environmental, healthcare, hospitality, insurance, products, retail, and transportation industries as client demand grew; by 2000 the firm described itself as a full-service litigation practice across nearly every major Texas industry. Brown Sims has since grown to more than 65 attorneys across offices in Houston, New Orleans, Miami, and Gulfport.

Practice Concentration

Brown Sims is a defense-oriented litigation firm covering more than 30 practice areas, including admiralty and maritime, insurance defense and coverage, products liability, construction, transportation, workers’ compensation defense, and business litigation. Its representative client list — including major insurers and carriers such as Ace USA, AON, Arch Insurance, Liberty Mutual, and Zurich-American, alongside operating companies like Halliburton and Textron — reflects a practice built substantially around defending insured parties and corporate defendants rather than plaintiff-side work, a genuine orientation worth disclosing directly rather than implying broader balance than the client list supports. See this Houston Business Litigation directory for how this defense-oriented firm compares to other commercial litigation practices serving Harris County.

Notable Work / Track Record

As a firm whose work is substantially defense-side and often confidential to insurer and corporate clients, Brown Sims does not publish a table of case outcomes with dollar figures, and Awesome Attorneys did not identify one — disclosed here rather than papered over. Client testimonials collected by the firm describe attorney Michael D. Williams as having “handled dozens of insurance defense matters” with “exemplary” results and providing “exemplary litigation and trial work” for an insurance-company client “for over 20 years.” Case outcomes in complex commercial and insurance-defense litigation depend heavily on the specific facts and coverage terms involved, and past results do not guarantee similar outcomes in any other case.

Client Voice

Client-submitted reviews on the firm’s Lawyers.com profile describe attorney Michael D. Williams as someone who “values relationships” and has served as “a personal legal advisor on many oil and gas, ranching and lease issues” for one reviewer’s farm and ranch operations “for over 25 years.” These reviews are attributed to named client relationships rather than composite marketing copy. Awesome Attorneys did not identify any negative or adverse public reviews for the firm.

Beyond the Courtroom

The firm’s own materials state that Brown Sims serves clients “in the courtroom, the boardroom, and the community,” but Awesome Attorneys did not identify specific, documented civic or pro bono initiatives beyond that general statement — a genuine gap for a firm approaching 60 years in practice, disclosed here rather than glossed over.

Recognition for This Houston Business Litigation Firm

Brown Sims holds an AV Preeminent rating from Martindale-Hubbell, the platform’s highest peer-review rating for legal ability and ethical standards, and multiple firm attorneys are separately recognized by Super Lawyers and Best Lawyers in America across insurance coverage, civil litigation, transportation/maritime, and business litigation categories. Awesome Attorneys did not identify a Texas Board of Legal Specialization certification individually attributed to founders Thomas Brown or Byron Sims, so “specialist” language is not applied to the firm’s founders, consistent with house policy reserving that term for documented TBLS certification.

Texas Legal Backdrop

Most Texas breach-of-contract claims carry a four-year limitations period, while fraud and breach-of-fiduciary-duty claims are separately subject to a four-year period under Texas Civil Practice & Remedies Code § 16.004. Maritime and admiralty disputes, a core part of Brown Sims’s practice, are frequently governed by federal maritime law rather than Texas state law, even when litigated in Texas state or federal courts, which can shift both the applicable limitations period and the substantive rules at issue. Insurance-coverage disputes in Texas are shaped heavily by the Texas Insurance Code’s prompt-payment and bad-faith provisions alongside general contract law. A prevailing party’s right to recover attorney’s fees on many contract claims runs through Chapter 38 of the Civil Practice & Remedies Code. None of this is legal advice; a specific business or insurance dispute should be evaluated by a licensed Texas attorney based on the actual facts involved.

Awesome Attorneys Assessment

Brown Sims’s clearest differentiator is nearly six decades of continuous practice built from a genuine maritime-law foundation, with an AV Preeminent Martindale rating and a client roster of major national insurers that speaks to deep institutional trust in its defense work. The honest trade-off is that this is substantially a defense-side firm — its representative-client list is dominated by insurers and corporate defendants rather than plaintiff-side businesses — so a business owner looking specifically for plaintiff-side representation in an affirmative claim against another party should weigh that orientation directly rather than assume even-handed representation. For a Texas business or insurer facing defense-side commercial, insurance-coverage, or maritime litigation, Brown Sims’s decades of institutional experience and AV rating are a reasonable basis for a shortlist.

Methodology and Sourcing

This profile was researched from Brown Sims’s own website, including its History page and founder biographies for Thomas A. Brown and G. Byron Sims; its Lawyers.com firm profile and client testimonials for attorney Michael D. Williams; its Super Lawyers Houston firm listing; and HG.org’s firm directory entry.

Publisher Disclosure and Independence Notice

Awesome Attorneys is an independent legal directory and editorial publication. This profile was not paid for, commissioned, or reviewed by Brown Sims, P.C. prior to publication. Awesome Attorneys may in the future offer sponsored placement products to attorneys and firms, including this one, but sponsorship has no bearing on the editorial content, inclusion, or findings of this profile.