Press Releases
Brinks Gilson & Lione Begins New Phase of Firm Leadership
Gustavo (Gus) Siller begins four-year term as president
January 18, 2018

Brinks Gilson & Lione, one of the largest intellectual property law firms in the United States, is pleased to announce that Gustavo (Gus) Siller has assumed the role of president at the 130+ lawyer firm, effective January 1, 2018. Gus, who was elected to a four-year term, succeeds James Sobieraj, who was elected in 2011.

As president, Gus will focus on several core pillars, including: maintaining the firm’s standing in an increasingly competitive legal environment, continuing to build on our strong reputation in the Chicago marketplace, increasing awareness of the firm’s diversity and inclusion initiatives and identifying efficient and effective business models for protecting clients’ technologies and IP portfolios.

“It is an exciting time for our firm as we continue to adapt and change in an increasingly competitive environment,” Gus said. “I’m confident our status as a premier and highly sought-after trusted legal partner will pave the way for success as we solve the most complex business challenges our clients will face in the years ahead.

“I’d be remiss if I didn’t note that it was a pleasure to work alongside James in his final year as president. His breadth of experience, judgment, and leadership have been instrumental to me during this transition.”

About Gus Siller

With a legal career that spans nearly three decades, Gus is an experienced patent litigator and counselor focused on developing successful intellectual property portfolios, and defending his clients in court. His practice is concentrated on matters across a span of industries, including, telecommunications, computer, electrical, and mechanical engineering, analog and digital technology, medical devices, computer design, semiconductor technology, expert systems, software-related technology, conveyor devices and packaging technology.

Gus recently played a pivotal role in the successful opening of Brinks, Gilson & Lione’s office in Shenzhen, China. The opening, announced earlier this month marked the first non-Chinese law firm to open an office in the region.

Gus received his J.D. from DePaul University College of Law and his B.S. from Northwestern University.

Brinks Gilson & Lione

Brinks Gilson & Lione, which celebrated its centennial year in 2017, is one of the largest intellectual property law firms in the US, and helps clients around the world to protect and enforce their intellectual property rights. Brinks Gilson & Lione’s more than 130 lawyers, patent agents and scientific advisors assist clients in all aspects of patent, trademark, unfair competition, trade secret, and copyright law. Brinks attorneys provide informed counsel with respect to innovations in a range of complex and valuable technologies, including pharmaceuticals, chemicals, bioengineering, industrial manufacturing, electronics and software, and medical devices. More information is at