Marrero, Couvillon & Associates, LLC
MC Small Blue LogoFor over 40 years, Marrero, Couvillon & Associates has provided high quality mechanical, electrical, and plumbing design and construction administration services at a competitive price. This company mission continues as MCA rededicates itself to providing a top quality product while efficiently utilizing today’s rapidly changing design technologies. MCA has offices in New Orleans and Baton Rouge, and is licensed in Louisiana, Texas, and Mississippi. We serve clients and work on projects throughout the Gulf South.
MCA acts a a sub-consultant to other design professionals, or contracts directly with owners, contractors and governmental agencies. Our work covers a diverse range of public, commercial and industrial projects; large and small. MCA’s certification as a DBE can add value to many publicly funded projects.
For your business needs in the New Orleans area, contact Greg Decoursey, AIA and New Orleans Manager. In Baton Rouge, Orien Butler, P.E. and Project Manager will be happy to assist you. Any issues – talk to Maria Darden, CPA, our business manager. Maria is eager to keep our clients happy. Finally, the door is always open to the office of Hugo A. Marrero Sr., president and CEO for 46 years.
Services Offered:


Our Mechanical design team use tools that involve the analysis, design, manufacturing, and maintenance of various systems. They apply the core principles, as well as knowledge in the field to design and analyze manufacturing plants, industrial equipment and machinery, heating and cooling systems. Engineering Drawings and Project Specifications for mechanical equipment such as boilers, pumps, heat exchangers, chillers and other mechanical equipment and more.


Our design services within the Commercial and Industrial sectors range from electrical distribution (both normal and emergency), to communications, life-safety and automation  infrastructure. We provide services for total coordination of electrical and low voltage infrastructure design for new and modernization projects including commercial and industrial buildings, medical facilities, residential projects, schools and educational support structures.


Our Plumbing Design team is involved with key systems that overlap into the mechanical, civil, and other engineering disciplines. This can be a key element of influence on projects in developing the water efficiency, energy, fire protection, and pollution systems of a facility. Our team is trained in the hydraulics of gravity flow and pressure flow, storm water control, pneumatics, pump characteristics, heat transfer, fire suppression, and building structures.


Electrical engineering may or may not include electronic engineering. The distinction is made between electronic engineering and electrical because it typically deals with small-scale electronic systems including security systems, computer systems and integrated circuits using electricity to transmit information.

Fire Protection

Words from our client:

Furmanite Technical Solutions

“When we needed electrical assistance with this project, Marrero-Couvillon came highly recommended. Our partnership with Marrero-Couvillon was a win-win situation. Their team was responsive, professional, and did an excellent job. Every deadline and requirement was met and they were enjoyable to work with. They provided a quality product that the customer was pleased with. We look forward to working with them again on future projects.”

--Brian Miller, Project Manager, Furmanite

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