An MEP Engineering firm with an experienced and engaged leadership team. We are professional engineers serving the entire AEC market.


  • Full Service MEP and Specialty Discipline Professional Engineering Services
  • HVAC Engineering, Mechanical Engineering
  • Electrical Engineering
  • Plumbing Engineering
  • Fire Alarm, Security and Special Systems
  • Lighting Design
  • Solar Power Engineering/Renewables System Design
  • Cost Estimating and Life Cycle Costing
  • Due Diligence Studies
  • Feasibility Studies
  • Value Engineering
  • Advanced Power Systems Engineering Analysis and Studies
  • MEP Engineering Peer Review Services
  • Lightning Protection and Grounding Design and Engineering
  • Campus and Structure Infrastructure Mechanical and Electrical Plant and Utility Master Planning
  • BIM and CADD Construction Documentation
  • Design Build Engineering Support and Pre ConstructionSupport
  • CA Services including Construction Administration/Management and Inspection
  • Energy Performance Assessments and Energy Audits

​JA Mills Engineering

Our firm began its operations in 2013 in order to provide Professional Engineering Consulting Services in the disciplines of Electrical Engineering, Mechanical Engineering and Plumbing Engineering. The office is located in San Antonio, Texas and has a growing portfolio that includes work regionally and nationally. Our leadership has the distinction of having been in a Principal role on LEED Platinum, Gold and multiple Silver projects. We know sustainability, we practice common sense.

JA Mills is capable of providing professional engineering services in multiple markets including Commercial, Healthcare, Retail, Hospitality, Venues, Transportation, Industrial, Critical Infrastructure and others. 

We specialize in Professional Mechanical Electrical and Plumbing (MEP) Engineered design as well as advanced power systems analysis and Peer Review.  

​"Engineering alters the natural place of things to suit human ends. Our design work must consequently  respect the privilege to do so. The effective integration of engineering into architecture and design should complement it and its purpose, add value and moderate the use of  financial and natural resources in the most practical way possible.  

We're committed to that responsibility. "

-  John Mills, P.E.

J A Mills Engineering, Inc.