RJ O’Neil Celebrates 100 Years of Service, Innovation, and Enduring Relationships
RJ O’Neil Celebrates 100 Years of Service, Innovation, and Enduring Relationships
Montgomery, Illinois — April 2026 — RJ O’Neil, a respected leader in mechanical services, proudly commemorates
its 100th anniversary this April, marking a century of excellence, innovation, and enduring relationships with clients,
partners, employees, and the communities it serves.
Founded in 1926, RJ O’Neil has evolved from a small, family-founded enterprise into one of the Midwest’s premier mechanical contractors. For a century, the company has remained steadfast in its commitment to delivering quality HVAC-R, plumbing, pipefitting, and maintenance services. While continuously adapting to advancements in technology and industry standards, RJ O’Neil has remained grounded in its core values of integrity, craftsmanship, and excellent customer service—principles that have guided the development of long-standing, trusted relationships.
“Reaching 100 years is a significant milestone that reflects the strength of our team, the trust of our clients, and the value of our partnerships,” said Jessica Medrano, CEO/President. “The relationships we have cultivated over generations are central to our success. While we take great pride in our history, we are equally focused on the opportunities that lie ahead.”
Throughout its history, RJ O’Neil has established a reputation for reliability, technical expertise, and forward-thinking solutions, serving a diverse portfolio of clients across healthcare, commercial, industrial, and institutional sectors. Many of these relationships span decades, underscoring the company’s commitment to collaboration, consistency, and mutual success. This sustained performance reflects a deliberate commitment to a relationship-driven, people-centered approach.
As the company looks toward its second century, RJ O’Neil remains focused on strategic growth, continued innovation, and strengthening the relationships that have been integral to its longevity. The organization is committed to investingin its workforce, enhancing client partnerships, and contributing meaningfully to the communities in which it operates.
“Our history provides a strong foundation, but it does not define our future,” Medrano added. “We remain committed to advancing our capabilities, fostering meaningful relationships, and delivering exceptional outcomes for generations to come.”
To mark this milestone, RJ O’Neil will host a series of events throughout the year, including employee recognition initiatives and community-focused programs that celebrate its legacy and reaffirm its commitment to the future.
About RJ O’Neil
RJ O’Neil is a full-service mechanical contractor providing HVAC-R, plumbing, service, and maintenance solutions.
Headquartered in Montgomery, Illinois, the company has served clients across the Midwest for 100 years, delivering industry-leading craftsmanship, innovative solutions, and dependable service while fostering long-term, trusted relationships.
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