Promotions at GLHN include Robert Lamb, PE (left), to CEO and Tiffany Gorrell to Director of Business Development and Marketing.

     TUCSON, ARIZONA (November 17, 2021) – GLHN Architects & Engineers, Inc., is pleased to announce the promotion of a pair of industry professionals to CEO and Director of Business Development and Marketing while honoring the retirement of two long-time company leaders.

An employee-owned firm with more than 50 years of expertise in healthcare and higher education projects, GLHN started a new chapter in the company’s history with the promotion of Robert Lamb, PE, to CEO and Tiffany Gorrell to Director of Business Development and Marketing.

GLHN also announced the retirement of Henry Johnstone, PE, as President and Cloriza Lomeli, as Associate Director of Business Development.

“Throughout the history of GLHN, it’s clear that our success has been built on the talent and dedication of people,” Lamb said. “‘Our success comes from helping others succeed’ is not just a catchphrase. It’s a recognition of a foundational truth in our business.”

Lamb joined GLHN in 2013 as COO, leading business development initiatives and building relationships with clients all over the world. He is stepping into the CEO position to grow the firm through new strategic initiatives.

Lamb earned a BS in Mechanical Engineering and an MBA from the University of Michigan. He is active with the Tucson Metro Chamber, is a current Board Member of Sun Corridor, and is a Candidate Evaluation Committee Chair and Board Chair of the Metropolitan Pima Alliance in Tucson. Lamb and his wife, Molly, have five children and are active in Tucson church and community activities.

Gorrell, who joined GLHN in 2014, will actively participate in the firm’s strategic planning process; be responsible for the firm’s overall marketing program; implement the firm’s business development strategy; develop project pursuit strategies and client capture plans; and maintain strategic relationships with leaders in AEC industry. She was promoted from Senior Marketing Coordinator.

Gorrell earned a BS in journalism with an emphasis on advertising from Northern Arizona University. She is actively involved in the Society for Marketing Professional Services (SMPS), Arizona Association of Economic Development (AAED), Building Insight and Leadership Development (BILD), and the Business Development Guild.

Away from the office she enjoys mountain biking, reading and is currently learning to play golf.

Henry Johnstone

Johnstone joined GLHN in 1988 as a mechanical engineer and developed expertise in campus utility systems and building heating, ventilating and air conditioning systems that engaged clients from Alaska to Oman to Columbia.

He was promoted to president in 2014 after holding the roles of Director of Mechanical Engineering and Mechanical Engineering Department Manager. Johnstone will remain involved as an emeritus consultant on special projects. He will also work on projects involving energy, water and agriculture in Tucson and Western New Mexico.

Lomeli has worked at GLHN for 32 years in a variety of roles from Special Project Administrator for Department of Veterans Affairs projects to Construction Administration for utility infrastructure work. As Associate Director of Business Development, she built enduring relationships with clients and business partners throughout the higher education sector.

Cloriza Lomeli

“My goal is to honor and maintain the amazing relationships Cloriza built over the last 30 years while developing new connections that will help us expand into a regional firm,” Gorrell said.

GLHN excels at medical and laboratory facilities, utility master planning, design of central plants and underground utility distribution systems, complex multi-phased renovation projects, fleet vehicle maintenance facilities, and enhanced systems commissioning.

 About GLHN Architects & Engineers, Inc.

GLHN is an employee-owned firm established in 1963 with a professional staff of more than 65. It operates offices in Phoenix and Tucson. Staff includes LEED Accredited Professionals in all disciplines, WELL Accredited Professionals, Green Globes Professionals, Certified Energy Managers, Building Energy Simulation Analysts, and Certified Commissioning Authorities and Technicians. GLHN has worked for nearly two dozen higher educational institutions across the United States and has established itself a leader in the development of campus carbon reduction programs, promoting initiatives to economize building performance and implement the use of alternative energies. GLHN embraces technological advancements in the A/E industry for the benefit of its clients and believes Building Information Modeling (BIM) is the future of the design and construction industry. The firm utilizes fully-integrated 3D design, using the Autodesk Autocad-based Revit and Civil3D platforms. For more information visit