Who We Are

Founded by Aaron Neumann, P.E. and Garret Neumann, P.E., in Castroville, Texas, Red Oak Engineering is a full service civil engineering firm specializing in commercial and residential land development, infrastructure design, master planning and consulting services. The Neumann’s learned hard work and determination on the ranches and farms of Medina County. Engrained for years, those characteristics became personal convictions and ultimately the fundamental attributes of Red Oak Engineering.

These qualities paired with a desire to provide excellent customer service led to our company motto: “Open, Honest, and Direct”. With these words, we strive to present parties with the required information in a clear, concise way to avoid confusion.

Office Phone: (830) 355-2734

Office Phone: (830) 355-2734

Cell Phone: (210) 452-4817

Cell Phone: (210) 452-4817

Aaron Neumann

Aaron began his engineering career working for a large company that specialized in land development.  With this company, he learned the engineering principles of commercial and residential land development.

In 2011, Aaron accepted a position at an engineering firm that specialized in roadway reconstruction and transportation projects. He worked on many projects during his tenure ranging from multi-millions dollar San Antonio roadway projects to small municipal street overlays. It is during this time that Aaron earned his Professional Engineering license.

A unique opportunity presented itself for Aaron to work with his college classmates.  Aaron chose to return to his original professional passion, land development. He spent three and a half years working as part of a rapidly growing land development firm managing a multi discipline team working on various projects in the commercial, residential and government sectors.

Garret Neumann

Garret began his engineering career at a large government consulting firm.  He used this opportunity to learn more about the Air Force, Government Consulting and contracting aspects of the engineering world. 

An opportunity with a design firm lead Garret to the private sector world of commercial and residential land development. He learned the engineering process, the precision of platting and the approval process for the City of San Antonio and other municipalities, working with a large firm.    

As luck would have it, Garret was offered a position at the same firm as his brother and was able to continue his engineering experience as Aaron’s co-worker.  At this firm, he continued learning, gaining experience and ultimately earning his Professional Engineering license.

Cell Phone: (210) 602-9615

Cell Phone: (210) 602-9615

These combined experiences gave Aaron and Garret the motivation to partner and start their own firm, thus began Red Oak Engineering.


What We Do

Red Oak Engineering's success is contingent upon our client's success and we take great pride in the personal relationships developed over a project's lifetime. With this mentality, relationships are formed and community-wide trust grows. Building a strong foundation of trust, with transparency and open communication is essential to achieving our goals, as well as helping our clients achieve theirs.



Open: Our team believes in open communication between the design team, the client and all reviewing agencies. The best way to ensure a project is completed on-time and under budget is when all team members have a firm grasp of scope, challenges and project deadlines.

Honest: Honesty with our clients, sub-consultants and municipal contacts is vital to build a strong foundation of trust. It is of the utmost importance to our firm that we deliver honesty throughout the design process.

Direct: It is beneficial for our clients to understand the full scope and developmental concerns project conception to completion, allowing them to build accurate budgets and proformas. 


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The name "Red Oak Engineering" represents the company values because, like Red Oak trees, we have deep roots and connections within the community enabling us to stand strong and firm in the face of adversity, and excel with endless potential.



Red Oak Engineering is actively involved with community development as members of both the Castroville Area Economic Development Council and the Castroville Chamber of Commerce. As well as being on the Medina Valley Youth Soccer Board of Directors, sponsors of multiple charities and coaches of youth sports teams.