Ardurra Expands California Water Expertise with Acquisition of MKN & Associates

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MIAMI--(BUSINESS WIRE)--Nov 17, 2025--

Ardurra Group, Inc. (Ardurra), a nationally recognized engineering and consulting firm, is pleased to announce the acquisition of MKN & Associates, Inc. (MKN), a respected California-based firm specializing in water and wastewater engineering services for municipalities and government agencies.

Ardurra, ranked #75 on Engineering News-Record’s (ENR) Top 500 Design Firms list and consistently among the top 20 firms in ENR’s Water Sourcebook rankings for water and wastewater, provides complex engineering and design services to public and private clients across the United States.

Founded in 2012, MKN has grown to a team of more than 85 professionals with multiple offices across California. The firm has delivered hundreds of successful water and wastewater projects for municipalities and public agencies and is recognized for its practical approach and innovative, cost-effective solutions. MKN’s technical capabilities and strong municipal relationships complement Ardurra’s existing water practice and strengthen its presence across the Western U.S.

“MKN has built one of California’s premier water and wastewater practices,” said Ernesto Aguilar, PE, President and CEO of Ardurra. “Their reputation for solving complex challenges and their strong client relationships make this partnership an exciting opportunity to build on our shared strengths.”

“Our success has always been driven by the talent and dedication of our team and the trust we’ve built with our clients,” said Mike Nunley, PE, President and CEO of MKN. “Partnering with Ardurra allows us to continue that mission with even greater impact, and together we’ll be able to serve our clients and the community in new and meaningful ways.”

MKN will continue to operate from its headquarters in San Luis Obispo, California, along with seven additional offices across the state. Ardurra now comprises a combined team of approximately 2,100 employees across more than 100 offices nationwide.

Morrissey Goodale, a specialized management consulting and research firm exclusively serving the architecture, engineering, and environmental consulting industries, initiated this transaction.

About Ardurra

Headquartered in Miami, Ardurra provides complex engineering, consulting, and design services for water, transportation, aviation, and public works across the United States. Ardurra Group, Inc. operates as a portfolio company of Littlejohn & Co., LLC. (Littlejohn). Littlejohn is a Greenwich, Connecticut-based investment firm focused on private equity and debt investments, primarily in middle-market companies. With approximately $8.0 billion in regulatory assets under management, the firm seeks to build sustainable success for its portfolio companies through a disciplined approach to engineering change. For more information about Littlejohn, visit www.littlejohnllc.com. For more about Ardurra, visit www.ardurra.com.

About MKN

Founded in 2012, MKN is a California-based engineering firm specializing in water and wastewater design services for municipalities and government agencies. With a team of more than 85 professionals, MKN partners with public agencies to deliver responsive, technically capable solutions through a hands-on approach and forward-thinking strategies. Learn more at https://www.mknassociates.us/

View source version on businesswire.com:https://www.businesswire.com/news/home/20251117287762/en/

CONTACT: Media Contact Information

Ginny Waters

813.327.6042|[email protected]

Ardurra Group, Inc

www.ardurra.com

KEYWORD: CALIFORNIA FLORIDA UNITED STATES NORTH AMERICA

INDUSTRY KEYWORD: UTILITIES CONSTRUCTION & PROPERTY ENERGY CONSULTING ENGINEERING PROFESSIONAL SERVICES URBAN PLANNING MANUFACTURING

SOURCE: Ardurra Group, Inc.

Copyright Business Wire 2025.

PUB: 11/17/2025 10:05 AM/DISC: 11/17/2025 10:05 AM

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