Family Business. Southern California Legacy.
70 Years of Doing It Right. The Mark-Costello Co. has been solving waste handling challenges for the region's most demanding facilities since 1956.
Founded in Los Angeles. Still Here.
The Mark-Costello Co. opened its doors in Greater Los Angeles in 1956. What started as a sales and distribution agency grew — through hard work, long relationships, and a refusal to cut corners — into one of Southern California's most trusted names in waste handling equipment.
In 1971, we expanded into waste systems. Over the following decades, that division became the core of what we do: compactors, balers, medical waste sterilizers, and the full-service support that keeps them running. Today, we serve clients across the United States and in more than 24 countries — including here at home.....SoFi Stadium, USC, UCLA, Disneyland, Magic Mountain, Seaworld, Getty Center, Cedars Siinai and Intuit Dome to name a few.
What 70 Years Actually Means?
It means this company has outlasted trends, competitors, and economic cycles — because the people running it treat it like what it is: a family business with a reputation to protect. It means your equipment was specified by people who've seen every application. Your service call goes to a team that's been doing this for decades. And the family name behind the operation is the same family answering the phone.
Management Team
Mike Kelleher
President
Kelleher brings decades of hands-on experience in the waste and recycling industry, with particular expertise in medical waste autoclave systems, industrial compaction, recycling equipment, and specialized waste-as well as plant layout and design. Throughout his career, he has worked closely with customers, engineers, contractors, and facility operators to develop solutions tailored to the operational demands of each project.
Ellen Kelleher CPA
General Manager
As Controller and Business Manager of The Mark-Costello Co., Ellen plays an integral role in the financial strength, stability, and continued success of the company
Ellen oversees the financial and administrative operations that support Mark-Costello’s manufacturing, sales, service, and project activities throughout the United States and internationally.
Rigo Tejeda
Plant & Operations Manager
Rigo keeps The Mark-Costello Co.'s day-to-day operations moving. From scheduling installs to coordinating the crews who deliver, service, and repair equipment in the field. His focus is simple: get the job done right the first time, with as little disruption to the customer as possible. That reliability is a big part of why clients keep calling Mark Costello when something needs to work.
Yahaira Centeno
Office Manager
Yahaira is the one making sure the details behind the scenes actually get handled — paperwork, scheduling, and the everyday coordination that keeps the office running smoothly. She's often the first friendly voice a customer hears, and she brings the same care to every call and order that's kept clients coming back to Mark Costello for decades.
Jim Ganey
Mechanical & Structural Engineer
Jim brings in-house engineering and design expertise to every piece of equipment The Mark-Costello Co. builds, and installs. Reviewing the mechanical and structural details that keep autoclaves, compactors and balers running safely under real-world conditions. Having that engineering knowledge on staff means problems get caught early and custom jobs get solved right the first time.
The Team Behind the Work
Every piece of equipment that leaves our shop passes through the hands of people who've spent decades doing this work. Our technicians, fabricators, and service crews bring the kind of experience you can't teach in a classroom — the instinct for what's wrong with a compactor before it's even apart, and the pride in getting it right the first time. Some of our team has been with us for 20, 30, even 40 years, doing this since 1956. That continuity shows up in the work: equipment that's built right, fixed right, and backed by people who know it inside and out.