Our History

Plummer (formerly Alan Plummer Associates, Inc.) began in Arlington, Texas. Using the living area as an office and setting up a drafting table in a bedroom, the firm began its operations. Within six years, the firm transitioned its service as primarily a study firm to a study and design firm, with an emphasis on water and wastewater treatment.

Overview of Plummer

PLUMMER has conducted business with quality and integrity for over 40 years. A regional firm founded with a vision to uphold environmental stewardship and technical excellence, Plummer is committed to serving our clients with distinction and integrity. Plummer has over 150 employees across Texas, Colorado and Oklahoma.

The technical capabilities of the firm’s personnel are based on educational backgrounds, professional training, and practical experience in the fields of civil engineering, hydraulics, computer applications, biology, and chemistry, as well as field sampling and laboratory analyses of water quality samples.

When it comes to water and wastewater infrastructure, we can study it, plan it, model it, design it, permit it, and manage it during construction. Dedicated to water resources and environmental science, and engineering, our firm balances sound scientific and engineering principles with innovative technology tailored to our clients’ needs. We have assisted our clients in planning and designing water, wastewater, and infrastructure; constructed wetlands; and permitting. Our award-winning projects include innovative water resource solutions, for municipal and industrial applications. If it involves water, we can help.

Strategic Vision

We provide our employees with meaningful, rewarding, and challenging careers with the common goal of advancing the quality and sustainability of water resources through environmental engineering and science.

By applying advanced technologies to deliver innovative solutions for the water industry, we serve our clients with integrity, delivering individualized service that consistently exceeds their needs and expectations.

Our vision is to be a nationally recognized leader in the water industry, distinguished by the value we offer our clients, the quality of our services, and an uncommon commitment to integrity and excellence.


Commitment and compassion for our people, including supporting family values. Commitment to achieving as much security for our people as practical. Commitment to high-quality service to our clients. Commitment to integrity.

General Operating Policy and Philosophy

Plummer is a consulting firm established to provide engineering services to help our clients better achieve their objectives. The services provided should be distinguished by quality and performed with integrity. It is our privilege and responsibility to help each individual in the firm develop his/her full capabilities and strengths in order to take personal pride in efficient, quality work and to meet his/her professional goals. It is important that we incorporate the values of affirmation, appreciation, and recognition in the environment in which we work. It is our belief that increased productivity and profit will be a byproduct of the implementation and integration of these philosophies.

Genesis of the Company Logo

“How blessed is the man who does not walk in the counsel of the wicked,
Nor stand in the path of sinners,
Nor sit in the seat of scoffers,
But his delight is in the law (“principles”) of the Lord,
And in His law he meditates day and night.
And he will be like a tree firmly planted by streams of water,
Which yields its fruit in its season,
And its leaf does not wither;
And in whatever he does, he prospers.”
Psalm 1:1-3