


Employees at Black & Veatch rank Mario Azar in the Bottom 40% of CEOs in Lawrence, KS. Comparatively, employees at Nexius rank Gaby Saliby in the Top 5% of CEOs in Dallas. Employees rate their CEO differently based on the frequency of interaction, ability to affect company culture, and drive measurable results.

CEO of Black & Veatch
BIO: With more than 33 years of global leadership experience, Mario Azar serves as Black & Veatch’s Chairman and CEO. He previously served as President of the Energy & Process Industries business sector, which provides critical infrastructure services and solutions to power, oil and gas, mining, and other process industry clients. Mario joined the company in 2018 as President of its global power business, guiding it through a strategic repositioning towards growth in renewable electricity generation, grid modernization, and resiliency. He also joined the Black & Veatch Board of Directors in 2021. Before Black & Veatch, Mario served in multiple executive roles and led large global businesses at Siemens, and previously Westinghouse, including as CEO of Siemens Oil & Gas and Marine, an engineered solutions and integration business unit operating globally in over 21 countries. He also founded a private consulting firm focused on energy and heavy industry. Mario serves as a member of the Board of Directors for the United States Energy Association and the Greater Kansas City Chamber of Commerce, and he previously served on the Board of the Solar Energy Industries Association. He earned a Bachelor of Science in electrical engineering from the University of North Carolina at Charlotte.

CEO of Nexius
BIO: Saliby started with Nexius in 2014 enacting as President and Chief Operating Officer. In July of 2020, Saliby took over role at Chief Executive Officer.

Women at Black & Veatch rated their CEO a C+

Women at Nexius rated their CEO an A+

Diverse Employees at Black & Veatch rated their CEO an A+

Diverse Employees at Nexius rated their CEO an A+




At Black & Veatch, employees in the Operations department rate Mario Azar the highest. According to employees, Mario Azar's ability to drive business results is Good. At Nexius, the Operations department's employees rate their CEO highest. And, 100% of Nexius' employees approve of their CEO's management style.