GISI Consulting Group Welcomes PERC Engineering, Expanding Energy Infrastructure Capabilities

Texas-based PERC Engineering joins GEI Consultants as GISI Consulting Group marks its seventh merger-partner addition in the past six months, deepening capabilities across energy and digital infrastructure.

NEW YORK CITY (June 24, 2026) — GISI Consulting Group, a global infrastructure consulting platform, today announced that its operating company GEI Consultants (GEI) has welcomed PERC Engineering (PERC), a Texas-based engineering and project management firm serving the energy industry.

Headquartered in Houston, PERC brings nearly 200 professionals and proven expertise in energy production facilities and pipelines across all stages of the energy lifecycle. PERC adds capabilities in electrical engineering, automation/instrumentation, civil/structural, process, inspection, and geospatial services to the combined platform.

This is the seventh merger-partner to join GISI Consulting Group since December 2025, including BSD Building System & Diagnostics (Singapore), LYL Consultants (Singapore), Get Set UK (London), Terrane Geoscience (Canada), and Buckham & Duffy (Australia). Together, these firms have significantly expanded a global infrastructure delivery Group spanning North America, Europe, the Middle East, and Asia-Pacific.

“The energy sector is undergoing one of the most consequential transformations in a generation, from grid modernization to the extraordinary power demands of AI infrastructure,” said Derek Amidon, CEO of GISI Consulting Group. “PERC has positioned itself at the center of that shift, and joining our Earth, Water & Energy segment alongside GEI gives them the multidisciplinary depth and global reach to go after opportunities that weren’t accessible before. This is exactly the kind of addition we’re seeking to add to GISI Consulting Group.”

GEI brings more than 40 years of experience serving the power and energy industry, serving as a trusted advisor to over 250 utility and energy companies across more than 45 states. The acquisition of PERC deepens that platform significantly.

Founded in 2013, PERC serves clients across the energy sector, including some of the most prominent names in the energy industry. The firm’s six core service lines (automation, electrical engineering, facilities, inspection, pipeline, and geospatial/survey) are delivered by specialized teams across offices in Houston, Fort Worth, Midland, Mont Belvieu, and Lafayette, Louisiana.

“PERC brings a highly specialized team with deep technical expertise and longstanding client relationships throughout the energy sector,” said Scott Wallington, Head of Earth, Water, and Energy at GISI Consulting Group and Chief Executive Officer of GEI Consultants. “Their capabilities in pipeline engineering, electrical systems, automation, and field services strongly complement GEI’s existing infrastructure and environmental platform. This partnership significantly advances our ability to serve the evolving needs of energy clients and positions GEI and GISI Consulting Group for continued growth across one of the most dynamic sectors in infrastructure today.”

The acquisition reflects GISI Consulting Group’s sustained momentum as a rapidly growing global infrastructure platform since formally launching in 2024. With more than 10,000 employees, over $2.5 billion in revenue, and a portfolio spanning infrastructure, earth and environment, and government and society sectors, GISI Consulting Group is building the next generation of consulting—combining the scale of a major firm with the specialist depth and delivery agility of its operating companies.

“Joining GISI Consulting Group is an exciting next chapter for PERC,” said Felipe Gonzalez, President of PERC Engineering. “We were looking for a partner that shared our entrepreneurial mindset, commitment to client service, and long-term vision for growth in the energy sector. The Group provides the scale, technical depth, and collaborative culture that will allow us to expand opportunities for our employees while continuing to deliver the high level of service our clients expect. Together, we will be able to pursue larger opportunities, broaden our capabilities, and create even greater value for our clients.”

Together, GEI and PERC will provide integrated engineering, environmental, geotechnical, water resources, permitting, and construction support services to energy clients across North America—covering the full project lifecycle from planning and permitting through construction, commissioning, and long-term asset management. This new capability positions the combined GEI-PERC platform at the intersection of two of infrastructure’s most consequential growth sectors: energy delivery and digital infrastructure.

Terms of the transaction were not disclosed.

About GISI Consulting Group
GISI Consulting Group is one company uniting some of the world’s top project management and engineering consulting firms to deliver complex infrastructure and development projects on a global scale. With more than $2.5 billion in revenue and 10,000 employees across 100+ countries, GISI Consulting Group combines the deep expertise of local businesses with the capabilities and resources of a worldwide platform. Its family of companies includes Hill International, GEI Consultants, Palladium, Asia Infrastructure Solutions, and other leading firms operating across infrastructure & mobility, earth, water & energy, and government & society. As a proudly employee-owned organization, GISI Consulting Group is committed to delivering excellence, accountability, and long-term value for clients and communities worldwide. For more information, visit www.gisiconsulting.com.

About GEI Consultants

GEI Consultants, Inc. is a consulting engineering firm that delivers professional services that improve the world’s built environment. With more than 1,800 staff in 60 offices across North America, GEI is a leader in providing multi-disciplined engineering and environmental services to a range of private and public sector clients, both domestically and abroad. As part of the employee-owned GISI Consulting Group, clients have access to deep expertise empowered by the resources of a worldwide platform. GEI engineers solutions across five primary end markets: Water Resources, Energy, Buildings, Infrastructure, and Industrial. For more information, visit www.geiconsultants.com.

About PERC Engineering

Founded in 2013, PERC Engineering is a Texas-based engineering and project management firm serving the energy industry across upstream, midstream, offshore, subsea, and renewables and carbon capture sectors. With nearly 200 professionals across offices in Houston, Fort Worth, Midland, Mont Belvieu, and Lafayette, Louisiana, PERC delivers automation, electrical engineering, facilities, inspection, pipeline, and survey services to a client base that includes Energy Transfer, Chevron, Enbridge, Hess, Eni, Motiva, Occidental, and others. The firm also provides design engineering and project management for natural gas infrastructure serving large-scale AI data center campuses across the United States. For more information, visit www.perc-eng.com.