Engineered for

Solutions

A structural engineering firm focused on solving complex challenges through collaboration, responsiveness, and dependable execution.

2,000+

Completed Projects

100+

Years of Expertise

150+

Lego Sets Built

40+

Years in Structural Engineering

Where technical expertise meets dependable partnership

Leigh + O’Kane is a Kansas City based structural engineering firm serving clients since 1986. Our team brings decades of experience across a wide range of building types and materials, with a strong focus on collaboration, clear communication, and reliable execution. We work as an extension of architects, owners, and contractors to deliver structural solutions that support project goals from design through construction.

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Licensed in

Missouri

Kansas

Colorado

Iowa

Kentucky

Minnesota

Nebraska

Washington

Working outside of these states? We’re prepared to travel and secure licensure wherever your project takes us.

What Sets Us Apart

We differentiate ourselves through thoughtful problem-solving, reliable execution, and true partnership with our clients.

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Reliable Execution

We communicate clearly, manage expectations, and consistently follow through so projects stay on track.

Problem Solvers

We remove roadblocks and solve complex challenges so project teams can move forward with confidence.

Invested Partners

We take pride in our work and stay invested in every detail, earning trust through consistency and care.

Join Our Team

We’re always looking for talented people who are driven to learn, collaborate, and solve meaningful problems.

We’ve worked with LEOK for over 13 years, and there’s a reason we keep coming back. They’re responsive, reasonable, and incredibly easy to work with. What sets them apart is how well they understand the unique challenges of our projects—they just get us. Whether it’s a major undertaking like the aquarium or a quick call about a bridge, they’re always there with honest answers and practical solutions.

One of my favorite moments was when Wayne joined us for a student tour on a Saturday morning—just because the students wanted to learn about the structural side of things. That kind of commitment, showing up with enthusiasm and a willingness to share, really speaks to who they are.

With so many consultants in our world, LEOK remains in the top tier—not just because they do great work, but because they’re genuinely great partners.

Linda, Kansas City Zoo & Aquarium

We've been working with LEOK since around 2023, and they’ve quickly become one of only two structural engineering firms we trust with our projects. What really sets them apart is their responsiveness—whether during design or construction, they get back to us quickly and consistently. That kind of communication is critical for us, especially during construction.

Their team is thorough, dependable, and easy to work with. Adam has been our main point of contact, and he's been fantastic—professional, calm, and always responsive. Wayne also plays a key role. Their overall work has been solid and reliable across the board.

Right now, LEOK is supporting us on multiple public safety projects. They're a great fit for us because we value clear communication, attention to detail, and professional integrity—and they deliver on all fronts.

I’d absolutely recommend LEOK to other architects, especially those looking for a responsive, skilled, and collaborative structural engineering partner. They’re the kind of firm you want on your team—not just because they do great work, but because they make the work easier.

Dalyn, WSKF Architects

Working with LEOK has been an incredibly positive experience. We’ve recently re-engaged with them on the Thompson Center project, and it’s been a great reminder of the strength of that relationship—which actually goes back over 25 years. Their team, especially Amanda, have been highly accessible and proactive, which is exactly what we we're up against tight budgets and fast-moving schedules.

What really stands out is their responsiveness, flexibility, and consistently good demeanor. The quality of their work is excellent, and their leadership’s personal approachability has made a big difference for both myself and our project team. Over the past two years, I’ve worked with more than 20 consultants, and LEOK is easily in my top five.

They’ve proven to be a trusted partner, and I wouldn’t hesitate to recommend them to others looking for a structural engineering firm that delivers with professionalism, clarity, and care.

Kwame, SFS Architecture

I’ve been working with Adam, Amanda, and the team at LEOK for over six years now, and they’ve consistently proven to be one of our top structural engineering partners. They are incredibly responsive—whether it’s a phone call or an email, I always hear back quickly, which is rare and incredibly valuable in today’s fast-paced project environment.

Their work is high-quality, cost-effective, and aligned with our own values: listen to the client, bring thoughtful solutions to the table, and meet deadlines. When challenges come up—and they always do—LEOK doesn’t hide behind excuses. Adam and the project managers, especially Wayne and Reagan, are collaborative and focused on finding practical, client-centered resolutions.

We’ve worked together on numerous jobs across the metro, and I can confidently say they’re easy to work with, professional, and dependable. I often recommend them to clients when the project is a good fit for their strengths. In three words? LEOK is fun, high-quality, and on-time. That’s the kind of partner every architect hopes for.

Roger, Collins Webb Architecture

We’ve worked with LEOK  for years, and they’ve become our go-to structural engineering partner. Their team is incredibly thorough, knowledgeable, and consistently responsive. We appreciate the familiarity of working with the same experts on every project—there’s a level of trust and efficiency that comes from that consistency.

They’re not just engineers; they’re collaborators. Whether it's early project scoping or troubleshooting a site issue, they’re always ready to work through solutions and communicate directly with our clients when needed. We’ve thrown a wide range of project types and sizes at them—from wood and steel to concrete structures—and they’ve handled it all with skill.

In one case, we had a discrepancy in footing design on a project. Their team was quick to respond, work through the problem, and deliver a smart, constructible solution without unnecessary delays or added cost.

I wouldn’t hesitate to recommend LEOK  to any architect looking for a dependable, skilled, and trusted structural engineering partner.

Hadley, Clark & Enersen

Let’s talk about your project

Our team is responsive, easy to reach, and ready to help you move forward.