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 SoFi Stadium, UCLA, Disneyland, and the Getty Center.
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.
The People Behind the Work
Mike Kelleher, Owner
Mike has spent his career building on what The Mark-Costello Co. started in 1956. His approach is straightforward: take care of the customer, stand behind the equipment, and don't overcomplicate it. That philosophy has kept clients coming back for decades.
Ellen Kelleher, General Manager
Ellen keeps the business running with the same attention to detail that's defined The Mark-Costello Co. since day one. She oversees operations with a steady hand and a deep understanding of what customers need — and what it takes to deliver.
Rigo Tejeda, Operations Manager
Rigo manages the day-to-day on the ground — coordinating installs, service calls, and the logistics that keep everything moving. When something needs to get done, Rigo makes sure it does.
Yahaira Centeno, Office Manager
Ellen keeps the business running with the same attention to detail that's defined The Mark-Costello Co. since day one. She oversees operations with a steady hand and a deep understanding of what customers need — and what it takes to deliver.