About Us

Trent Weiss founded Siege Engineering to set a new global standard for elite chemical process engineering and technology consulting. His 30 years of experience includes operations management, process design, technology development, and project engineering in specialty and commodity petrochemicals. Trent has master’s degrees in chemical engineering from the University of Houston and organic chemistry from Rice University. His BS degree is from Texas A&M University, and he has been a licensed Professional Engineer in Texas since 2003. His expertise includes complex reactions and distillation systems in continuous or batch operation modes. He also builds and maintains DCS systems. (Honeywell, Yokogawa, Delta V).

John is a veteran entrepreneur and operating executive who over a 35 year technology career led 3 start-ups to exit and served as an advisor or Board member to many others. John holds a Bachelors in Law and Graduate Diploma in Computer Science from the University of Cambridge and has a focus on AI technologies throughout his career. John is based in Charlottesville, VA but will visit us in Houston regularly. HE will take responsibility for Corporate Strategy and Corporate Development.

Lina Matar serves as the dynamic VP of Commercial and Operations at Siege. With a proven track record of success for companies like Xerox and experience in medical device representation, Lina possesses over two decades of Business Development acumen. Holding a Bachelor's from Lamar University, she embodies the philosophy "Customer service is the new marketing," with a focus on cultivating strategic partnerships that fuel revenue growth and enhance profitability through client-centric strategies.

Janeen Brimacombe is an accomplished entrepreneur who followed a senior career in the US government, serving as a director on the National Security Council and in the White House while founding a successful technology startup, OmniCompete, which she took to exit. ​OmniCompete Ltd. provided a platform for crowdsourcing innovation with a particular focus on emerging technologies relevant to national security. The idea for OmniCompete was conceived while Janeen was earning her MBA at the London Business School, which subsequently awarded her its annual prize for entrepreneurial achievement. ​Janeen also holds a Master’s Degree in Chemical Engineering from the University of Michigan at Ann Arbor, and a BS in Chemical Engineering from Wayne State University.

John Stephens has a BS in chemistry from Texas A&M and did graduate work in organic chemistry at the University of Pittsburgh. He also has an MBA from Geneva College. He specializes in polymer chemistry, has had R&D roles in the industry, and has been a professor and lecturer for colleges in the Pittsburgh area. John has driven key technology innovations for a key Siege customer and manages our research staff.