J A Mills Engineering, Inc.

John Mills, P.E.

Memberships , Affiliations & Credentials


Thomas Otten, P.E.

BSEE, 1995 University of Texas at San Antonio

​Texas P.E., 2003

Thomas Otten, P.E. is a licensed professional engineer with some 18 years in health care design on multiple large scale projects. His project experience on military hospitals, military outpatient facilities and non-military outpatient facilities is an asset to all types of projects. His experience includes pre-design concept studies, analysis and design of HVAC systems, mechanical piping, medical gas system sizing, building loads and energy analysis, plumbing calculations as well as cost estimating. He has a unique specialty in IT and its application to BIM and software modeling and the integration of software analysis tools to engineering. His accomplishments include the development of systems database and system calculation tools used to model and document large building projects. Mr. Otten is a senior level mechanical engineer and performs as mechanical design lead and BIM deployment manager.

Memberships , Affiliations & Credentials


BD&C 2011

IEEE 1991, SM 2004

NFPA 1996

NSPE 2000

​ASHRAE 2014

John Mills, P.E. is a licensed professional engineer with over 30 years of diverse experience in electrical design and electrical engineering. He has extensive experience in project management, and business management having been a part of small, medium and large consulting firms and industry. He is an experienced senior level electrical engineer who has performed designs on low and medium voltage power distribution systems , lighting systems, communication systems , security, solar photovoltaic and fire protection systems for both newly constructed and renovated industrial, K-12, higher education, hospitality, healthcare, commercial, retail and institutional buildings. He served many years as a partner and principal with a large national engineering firm prior to launching his new firm. As such, he has extensive management experience in business operations, client satisfaction and employee relations. A LEED accredited professional, he maintains his Building Design & Construction Credentials and has designed projects that have earned LEED PLATINUM, LEED GOLD and LEED SILVER CERTIFICATIONS.