David Grzebinski and the art of keeping things moving

A chemical plant is an unforgiving place to discover that an elegant idea does not work. David Grzebinski began his working life writing software to control equipment, first during student co-op assignments, then at a Dow facility in Plaquemine, Louisiana. The work put a young engineer in conversation with machinery and the people running it. Years later, his business would include rivers, barges, engines, and generators. The underlying question remained recognizably industrial: how do you make the whole thing work?

Grzebinski has led Houston-based Kirby as chief executive since April 2014. The job joins two businesses that look rather different on a photograph: marine transportation and equipment distribution and services. Follow the machinery, however, and the family resemblance appears. A boat requires propulsion. An engine requires attention. Someone must understand what happens when a component, a delivery, or a commercial assumption fails.

An engineer learns the language of capital

His qualifications span three disciplines. He earned a chemical engineering degree at the University of South Florida, an MBA at Tulane, and the Chartered Financial Analyst designation. Engineering asks whether a system will function. Finance asks what it costs and what it returns. Running a company requires those conversations to take place in the same room, preferably before anyone orders the equipment.

Before Kirby, he worked at Dow and FMC Technologies in roles involving operations and finance. Kirby recruited him in 2010. By March of that year, he was its chief financial officer and executive vice president. He subsequently chaired its principal offshore marine transportation subsidiary for part of 2012 and 2013. The progression gave him responsibilities on both sides of an industrial balance sheet: the assets themselves and the money committed to them.

The dates matter. Grzebinski arrived at an established company, learned it from a senior financial position, and then moved into general management. His story offers the pleasure of a career that makes sense without requiring a childhood prophecy. There were plants, financial responsibilities, and increasingly broad operating decisions. Eventually there was a fleet.

The river keeps its own calendar

In January 2014, Kirby made him president and chief operating officer. On April 29, the board elected him chief executive, succeeding Joe Pyne, who remained executive chairman. The handover followed an announced succession plan. It also came with immediate work: the same results announcement disclosed approval to build three coastal articulated tank barge and tugboat units. A new title arrived beside a substantial commitment to physical assets.

The river did not pause for the succession. Weather, customer schedules, equipment condition, and commodity markets continued to exert their claims. That is part of what makes this particular chief executive’s job revealing. A vessel cannot be persuaded to finish maintenance early by improving the language in a presentation. Fog is similarly unreceptive to management enthusiasm.

By 2015, falling crude prices were testing the business. Kirby’s annual account of that year described weakening markets and excess industry capacity. Yet it also recorded deliveries of 36 new inland tank barges, the purchase of six pressure barges, and share repurchases of approximately $241 million. Those were different uses of capital in the same difficult year, with different consequences for the future.

That period complicates any tidy tale of a new leader and an uninterrupted ascent. Grzebinski’s tenure has involved decisions made through industrial cycles. A barge bought today remains a piece of equipment tomorrow, whatever the market decides to call it. The appeal of patient ownership is easy to explain; maintaining it through weak conditions is the actual assignment.

Permission to interrupt

One of Grzebinski’s more specific descriptions of leadership concerns the employee who interrupts an unsafe operation. He has described stopping such work as a duty, including when the customer is important and the employee is junior. He has also described recognizing employees who did it. The practical question is whether the person nearest a problem can act before a distant hierarchy finishes considering it.

“We want the fleet to know it is more than a slogan. We mean it.”David Grzebinski, 2023

Training gives that principle a working setting. Kirby’s investment in mariner instruction predates his appointment as chief executive. In 2013, its vessel-operations leadership described a center teaching people from deckhand to master, with new deckhands training before going aboard. Grzebinski inherited an institution with its own habits and expertise. The responsibility was to keep investing in the people who would use it.

The company’s career paths extend beyond an office or a university degree. Marine personnel can progress through vessel roles, while equipment businesses require technicians and mechanics. Kirby’s recruitment material describes training and advancement as part of retaining employees. For an executive with an engineering degree and an MBA, it is a useful reminder that a company’s intelligence is distributed across many kinds of work.

There is also a concrete way the fleet marks its expectations: blue flags recognizing boats and operating groups that complete a year without incidents involving people, equipment, or the environment. A flag is a modest object compared with a corporate policy document. It does, however, have the advantage of being visible from another boat.

A boat that plugs in

In August 2023, Kirby christened the Green Diamond, a plug-in hybrid electric inland towing vessel. The boat brought several parts of Grzebinski’s company into a single project. San Jac Marine built it. Stewart & Stevenson supplied the power-management, control, and propulsion systems. Kirby’s marine business supplied the operating context. Industrial connections that can look abstract on an organization chart had acquired a hull.

The technology drew on electrical equipment expertise developed for oilfield applications. Battery power and onboard generators gave the vessel different operating modes, with shoreside charging available for local work. Its anticipated fuel savings depended on how it was used. That qualification belongs in the story: an engineering result comes with operating conditions, even when a ribbon-cutting would prefer a shorter sentence.

The equipment side had received a substantial addition in 2017, when Kirby agreed to acquire Stewart & Stevenson for approximately $710 million before adjustments and fees. At the time, Kirby described the attraction in terms of geography, customer mix, and a larger distribution and services business. The later towboat project illustrates one use of having those capabilities under the same corporate roof.

The Green Diamond began customer operations in 2024. Kirby’s subsequent reporting described further hybrid construction. Grzebinski’s connection to the Blue Sky Maritime Coalition places him in a wider maritime effort around emissions reduction, alongside his roles with the Coast Guard Foundation and the American Bureau of Shipping. These are organizations concerned with the industry’s institutions as well as its equipment.

A hometown with a waterfront

In 2023, the Greater Houston Port Bureau selected Grzebinski as its Maritime Leader of the Year. Accepting the recognition, he directed attention toward Kirby employees and the company’s place on the Houston Ship Channel. That geographic connection is unusually tangible. His business works on the waterway through which much of the region’s industrial economy moves.

The August dinner came with proclamations, including one declaring August 26 David Grzebinski Day in Houston. It is a pleasing civic extravagance for someone whose ordinary responsibilities include such subjects as equipment utilization. Recognition is allowed its evening clothes. The business resumes afterward.

His public biography includes another distinction: Eagle Scout. Away from work, he has named adventure travel with his family among his interests. His reading list has ranged from business books to science fiction, and he has expressed a liking for Indian and Mediterranean food. These details offer a little room around the corporate title, which otherwise threatens to occupy the entire page.

The quarter and the longer voyage

In April 2024, Christian O’Neil became Kirby’s president and chief operating officer, responsible for day-to-day operations across both businesses. Grzebinski remained chief executive. The arrangement made a formal distinction between his overall leadership and O’Neil’s operating responsibilities. It also placed an executive with more than 25 years at the company in the presidency.

The business they oversee continues to change. In March 2026, Kirby purchased 23 inland tank barges and three high-horsepower towboats for $95.8 million. Meanwhile, power generation has become a significant part of distribution and services, with demand from industrial customers and data centers. The barge company participates in the electricity business, too. Its engineering interests travel rather well.

The latest published quarter, reported in July 2026, contained that familiar industrial mixture: improving demand alongside operating pressures. Fuel-cost timing and shipyard work affected marine margins. Power generation supported the equipment business. Grzebinski maintained the company’s annual earnings-per-share growth guidance of 5% to 15%, anticipating results toward its upper end. That was an expectation for the year, rather than an accomplished result.

His role sits among those distinctions: demand and delivery, investment and return, a plan and its eventual outcome. The early engineer had equipment to understand and people to listen to. The chief executive has a larger collection of both. A fleet makes the scale visible. The work still depends on getting the details right, then returning to them when the conditions change.