Sean’s years of experience as an active-duty US Army Captain in the selective and prestigious US Army Judge Advocate General’s (JAG) Corps are a valuable asset to Tully Rinckey PLLC’s military law practice group. Having served his country honorably at the largest military installation in the world in Fort Hood, Texas as a Judge Advocate from 2009 until 2013, Sean is an aggressive and tenacious advocate for all service members facing legal issues. He is able to pull from his significant and diverse experience as an active-duty attorney in the Army JAG Corps, and as a civilian military law attorney, he forcefully and efficiently represents service members in both administrative and criminal proceedings. Sean originally joined Tully Rinckey’s Albany, N.Y., office as a Senior Associate, where he was first promoted to Partner and eventually Managing Partner of the firm’s first footprint in the state of Texas.
As Managing Partner of Tully Rinckey PLLC’s Houston office, Sean oversees all of the office’s operations while concentrating his practice on military law; routinely handling cases involving Article 15s, letters of reprimand, courts-martial and officer/enlisted separation proceedings. Sean also handles federal labor and employment law cases and security clearance representation. He is also a member of the National Security Lawyers Association (NSLA).
Sean has appeared for his clients throughout CONUS, to include, practically hundreds of military bases, posts and installations across the United States and also appears frequently OCONUS around the world litigating fully contested military trials across Europe and Asia. From Houston, Sean can access any location in the world on short notice and with a large team in support he can appear promptly while hitting the ground running on any military law matter.
Sean also is a member of the Houston office’s Insurance Law Practice, where he assists clients with bad-faith litigation cases, first- and third-party coverage disputes involving CGL, business auto, commercial and residential property, and ERISA policies.
Sean is an experienced insurance coverage litigator. He has handled numerous lawsuits involving property damage claims under residential and commercial policies. He has appeared in numerous federal and state courts throughout Texas. Mr. Timmons is well-versed in coverage litigation including discovery and its limits, taking and defending depositions, motion practice, evidentiary hearings, alternative dispute resolution, and pre-trial and trial of coverage disputes.
Additionally, Sean is passionate about International Law and frequently travels the globe for the firm on behalf of his clients in each branch of service with the United States Armed Forces.
Prior to joining Tully Rinckey PLLC, Sean worked in private practice in Houston, where he was an active member of the State Bar of Texas International Law Section, and the State Bar of Texas Military and Veterans Law Section and the State Bar of Texas Insurance Law Section. Sean is a current member of the Houston Bar Association and is licensed to practice law in both New York and every State and Federal Court in Texas. Before relocating temporarily to New York, Sean also served in Texas as a military law adviser to a number of family law attorneys. Sean previously served at Fort Hood as an Army Captain, where he was the primary legal adviser to the President (O-6) of the Fort Hood Officer Separation Board after having started his Army career in 1998 as a private (E-1) Field Artilleryman and ascending to the rank of Captain (O-3). As a Judge Advocate, Sean led the effort in 2010 as Acting Chief of Fort Hood Client Services to have the Commanding General of III Corps blacklist a notoriously corrupt landlord-tenant company that was infamous for ripping off active duty soldiers.
In addition to his significant military law career Sean has tried civil cases to verdict and has extensive motion practice experience throughout the state. He has gained a vast amount of knowledge handling institutional discovery concerning insurance companies in various Hurricane and Hail Storm Multi-District Litigation in Texas. Sean has been involved in all stages of insurance pre-trial and trial litigation including mediations, depositions, and fierce discovery disputes. Today, he uses his sage wisdom gained from these fierce battles across Texas and the country to benefit his clients.
Prior to becoming an attorney, Sean deployed as a combat arms Artilleryman to Bosnia in 1999 as a member of Operation Joint Forge. He deployed again to the Middle East after the Sept. 11 attacks as part of Task Force Blackjack in the most forward deployed US Army heavy brigade combat team during Operation Enduring Freedom in the fall of 2001 and spring of 2002. His task force would serve in both Kuwait and Afghanistan. Sean has been awarded the NATO Medal, the National Defense Service Medal, Army Service Ribbon, the Global War on Terrorism Service Medal, five Army Achievement Medals, the Good Conduct Medal and an Army Commendation Medal. After leaving active duty upon completing his initial enlistment, while attending college full time Sean worked at first for the Texas Parks and Wildlife Department as a Human Resources Technician where he handled customer service duties and labor law compliance tasks. After this position and prior to law school Sean was a Human Resources Manager for Sears Holding Corporation in Austin, Texas; where he managed the personnel department for three individual stores with over six hundred employees. Sean holds a Master of Laws in International Law from the University of Houston Law Center. He graduated cum laude from South Texas College of Law, Houston and graduated summa cum laude from the University of Texas at San Antonio. Sean was also elected as a council member to the State Bar of Texas Military and Veterans Law Section for the 2017-2019 term.
In 2021, Sean was commissioned an honorary Admiral in the Texas Navy.
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