Lochner, an Egis Group company, has appointed veteran nuclear and energy executive Karen Wiemelt to its Board of Directors, adding more than 35 years of leadership and governance experience to the firm as it advances its U.S. growth strategy.
Wiemelt brings deep expertise in program management, environmental remediation, nuclear operations, strategic planning, and organizational transformation. Over her career, she has led complex, mission-critical programs and served on numerous industry, project, and corporate boards across highly regulated and multinational environments.
She previously held progressive leadership roles at CH2M prior to its acquisition by Jacobs in 2017. At Jacobs, Wiemelt was appointed Senior Vice President and General Manager of the Energy, Security, and Technology business unit. In that role, she led the company’s global portfolio of nuclear power and decommissioning work, as well as security and advanced technology programs outside the United States. She oversaw operational excellence, business growth, talent development, and financial performance across a portfolio with annual revenue exceeding $1.5 billion and more than 8,000 employees worldwide.
Her experience closely aligns with Egis’ nuclear sector capabilities, which span third- and fourth-generation reactors, fusion reactors, small modular reactors, and civilian nuclear facilities. Since 1948, Egis has supported the full nuclear lifecycle, including consultancy, facility design and engineering, project management, and nuclear waste management.
Founded in 1944, Lochner provides planning, environmental, design, construction engineering and inspection, and program and construction management services to clients in aviation, surface transportation, and water across the United States. The company is ranked No. 98 on Engineering News-Record’s Top 500 Design Firms list. In July 2025, Lochner merged with Egis Group, positioning the firm as the cornerstone of Egis’ U.S. expansion strategy.
Egis operates in 100 countries with 22,000 employees, delivering architecture, consulting, construction engineering, operations, and mobility services. The company ranks No. 17 on Engineering News-Record’s Top 225 International Design Firms list and No. 7 in Transportation.
KEY QUOTES
“Karen’s experience leading complex, mission-critical programs and governing global organizations makes her an exceptional addition to our Board. Her perspective will be invaluable as Lochner and Egis continue to expand our combined technical capabilities, strengthen operational excellence, and pursue long-term, sustainable growth in the U.S. market.”
Terry Ruhl, CEO of Lochner
“I am honored to join Lochner’s Board of Directors. Lochner and Egis have a strong legacy of technical excellence and public service, and I look forward to supporting the firm’s leadership team as it advances its strategic vision and continues delivering impactful infrastructure solutions.”
Karen Wiemelt, Board Member, Lochner
