International Engineering Firm With St. Louis Roots Names Ziad Hanna President

Date Posted: May 26, 2026

Posted In: Organizations,

by Tom Finan, Executive Director, Construction Forum

An international engineering company based in Webster Groves has named a new leader as it continues expanding its global footprint.

Introba, the engineering and consulting firm formed through the merger of Webster Groves-based Ross & Baruzzini and California-based Integral Group, has appointed industry veteran Ziad Hanna as president. Hanna succeeds Matthew Cummings in the role, while Cummings will continue serving as CEO of Introba and as president and CEO of sister infrastructure brands TYLin and Landrum & Brown.

The appointment carries local significance because of Introba’s ties to Ross & Baruzzini, long one of the St. Louis region’s largest engineering firms. Ross & Baruzzini, founded in St. Louis in 1953, merged with Integral Group in 2022 after both firms had previously been acquired in 2009 by Dar Group, a privately held engineering, architecture and consulting organization headquartered in Dubai. Dar Group later rebranded as Sidara in 2023 as part of a broader effort to align its global infrastructure businesses under a unified identity.

35 Years Experience

Hanna brings more than 35 years of engineering and infrastructure experience to the position. Most recently, he served as vice president of the building division for global professional services firm WSP in Canada, where he played leadership roles in projects involving data centers, healthcare facilities and industrial infrastructure.

His career also includes senior positions with Arup, SNC-Lavalin, BBA Consultants and AECOM, among others.

Hanna has an academic background spanning multiple disciplines and institutions. He earned a bachelor’s degree in mechanical engineering from the American University of Beirut, a bachelor’s degree in civil engineering from Washington University in St. Louis, a master’s degree in civil engineering from McGill University and a master’s degree in building engineering from Concordia University.

Extraordinary Foundation of Talent

“Introba has an extraordinary foundation of talented people with deep technical expertise and a purpose-driven approach to solving complex challenges for clients,” Hanna said. “I’m honored to be selected for this role and to lead a world-class team of problem solvers as we combine cutting-edge digital solutions with emerging innovations and industry-leading sustainability strategies to transform the built environment.”

According to Introba, Hanna will focus on advancing the company’s strategy and performance across North America while supporting growth across its global markets. His priorities are expected to include expanding client relationships, identifying new market opportunities, maintaining operational discipline and evaluating strategic investments aligned with the company’s long-term direction.

“Ziad’s appointment is an important moment for Introba,” CEO Matthew Cummings said in a statement. “He brings the experience and energy needed to lead this global business — translating our strategic priorities into actionable plans and accelerating growth.”

Introba is a global engineering and consulting firm with specialists in the U.S., Canada, UK, Europe, and Australia. Its areas of expertise include mechanical, electrical, technology, security, and fire systems engineering, supported by digital advisory, systems integration, and sustainability consulting services.