Business Details
50+ Years
experience
Trusted Infrastructure Services Provider
Founded in 1944, Koa Corporation has established itself as a trusted infrastructure services provider specializing in aviation, surface transportation, and water projects across the United States. Our mission centers on improving communities through innovative solutions that blend built and natural environments. With a team of experienced professionals, we deliver planning, design, and construction services that prioritize safety, sustainability, and operational excellence. Over eight decades, we have evolved from a transportation-focused firm to a multidisciplinary leader, integrating environmental stewardship and technology-driven approaches into every project. Our client-first philosophy emphasizes collaboration, ensuring that every solution aligns with community needs and industry standards.Headquartered in Chicago, we operate coast-to-coast with 22 offices and over 1,200 employees dedicated to advancing infrastructure modernization. Recognized as #98 in ENRs 2025 Top 500 Design Firms, we combine historical expertise with forward-thinking strategies to address complex challenges. Our culture fosters innovation, quality, and delivery excellence, empowering employees to contribute meaningfully to projects that enhance connectivity and quality of life. From airside airport improvements to multimodal transportation systems, we remain committed to shaping infrastructure that serves generations to come.
Services
Aviation Infrastructure
Surface Transportation Planning
Water/Wastewater Engineering
Environmental Planning
Construction Management
Details
- Year established: 1944
Highlights and features
- We offer 80+ years of infrastructure engineering expertise across aviation, transportation, and water sectors.
- Our cross-disciplinary team delivers comprehensive solutions from planning to construction management.
- We maintain a proven track record of successful projects for public and private sector clients nationwide.
- Our national reach includes 22 offices and coast-to-coast project experience.
- We prioritize sustainability, safety, and community-focused design in every project.
What people say
Technical expertise
Long-term reliability
Community-focused solutions
Proven track record
Client-first approach
Services
Aviation Infrastructure
We partner with commercial and general aviation airports to upgrade infrastructure, increase capacity, and enhance safety. Our services include airside and landside improvements, terminal expansions, and compliance with FAA regulations. With expertise in both planning and construction phases, we deliver solutions that improve operational efficiency and passenger experience while maintaining environmental responsibility.
Surface Transportation
Our planning and design services cover highways, interchanges, toll roads, and complete streets that support safe, efficient movement of people and goods. We specialize in context-sensitive designs that integrate with urban and rural environments, utilizing intelligent transportation systems and sustainable materials to address current and future mobility needs across the United States.
Water/Wastewater Engineering
We provide comprehensive engineering for water and wastewater facilities, including treatment plants, pipelines, and stormwater management systems. Our approach focuses on operability, sustainability, and regulatory compliance, ensuring reliable infrastructure that protects public health and environmental quality through all project phases from planning to construction.
Environmental Planning
Our environmental planning integrates ecological considerations into infrastructure projects through NEPA compliance, impact assessments, and mitigation strategies. We help clients navigate regulatory requirements while implementing green infrastructure solutions that balance development with natural resource protection for long-term community benefits.
Construction Management
We offer full-cycle construction management services including inspection, quality control, and program management for complex infrastructure projects. Our team ensures adherence to schedules, budgets, and safety standards while coordinating with stakeholders to deliver high-quality results that meet technical specifications and community expectations.
People
Terry A. Ruhl
Chief Executive Officer
Terry Ruhl leads Koa Corporation's strategic vision as CEO, driving growth through acquisitions and market expansion. With decades of infrastructure industry experience, he focuses on transforming Koa Corporation into a top-tier professional services organization while maintaining its legacy of quality and client service.
Ryan Beckman
Chief Financial Officer
Ryan Beckman oversees Koa Corporation's financial operations, ensuring fiscal stability and strategic investment. He brings extensive financial leadership experience in engineering and construction sectors, supporting the company's growth initiatives and long-term sustainability goals.
Shannon Latham
Chief People Officer
Shannon Latham leads human resources strategy, focusing on talent development and organizational culture. With SPHR certification, she drives initiatives that enhance employee engagement, diversity, and professional growth across Koa Corporation's 22 offices nationwide.
Dan Manojlovski
Chief Operating Officer
Dan Manojlovski manages daily operations, ensuring efficient delivery of Koa Corporation's infrastructure services. A licensed professional engineer, he leverages technical expertise and operational leadership to maintain project excellence across aviation, transportation, and water sectors.
Karen Friese
Water Practice Lead
Karen Friese directs Koa Corporation's water resources initiatives, combining engineering expertise with environmental stewardship. As Board Director and practice leader, she oversees water/wastewater projects that emphasize sustainability, regulatory compliance, and community impact nationwide.
Questions
What infrastructure sectors does Lochner specialize in?
Lochner specializes in aviation, surface transportation, and water/wastewater infrastructure projects nationwide.
How long has Lochner been in business?
Lochner has provided infrastructure services since 1944, with 80+ years of industry experience.
Where is Lochner headquartered?
Lochner's headquarters is located at 225 W Washington Street, 12th Floor, Chicago, IL 60606.
Does Lochner operate outside Chicago?
Yes, Lochner has 22 offices coast-to-coast and serves clients throughout the United States.
What services does Lochner offer?
We provide planning, design, construction management, and environmental consulting for infrastructure projects.
How does Lochner approach sustainability?
We integrate environmental stewardship into projects through green infrastructure and context-sensitive designs.
