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Delivers high value engineering solutions

About Us

Our History
In 1970 Richard G. Lee founded the firm, previously known as Lee & Associates. 100% of the outstanding shares of the corporation are employee owned. Raymond D. Cole, CEO and President, has been employed by the firm since 1981 and has been the majority shareholder since 1994. In 1999 the corporate name was changed to Axiom Engineers℠.

Axiom: Noun [from Greek axioma, literally something worthy]
• A maxim widely accepted on its intrinsic merit
• A statement accepted as true as the basis for argument or inference; postulate
• An established rule or principle or a self-evident truth.

Our Mission

Axiom Engineers℠ is make our world a better place, to enhance our employees’ lives while they help us prosper by becoming an indispensable partner with our clients.
Critical to achieving our mission is cost-effective and timely delivery of high quality design and engineering services. We achieve this through integration and transfer of the latest knowledge in our areas of expertise and by leveraging our unique intellectual capital for our clients' benefit.

Our Team

Sheila Tansill, Chief Financial Officer

Raymond D. Cole, P.E

Principal President CEO

Mr. Cole has been the President and CEO since 1991. Highly experienced in all aspects of mechanical engineering: HVAC, fire protection, plumbing, power generation and cogeneration, controls, process piping, and refrigeration. Industries served include hospitality, wineries, health care, agricultural, military, institutional, commercial, educational, and other industrial sectors. Mr. Cole is a Licensed Engineer in the States of California, Georgia, and Arizona and is a LEED Accredited Professional.

Sheila Tansill, Chief Financial Officer

William M. Estes, P.E.

Principal, Vice President
Manager – Building Mechanical Systems

Mr. Estes, Licensed Engineer in the States of CA and CO, has extensive hands-on project involvement and experience in high-performance buildings, HVAC design, energy computer simulations and analysis, plumbing, process piping, process systems, fire protection, refrigeration, water conservation, mechanical systems design, engineering economics, and project management in commercial, institutional, residential, and industrial facilities. Mr. Estes joined Axiom Engineers℠ in 1985 and was promoted to Principal in 2000.

Sheila Tansill, Chief Financial Officer

Metin Serttunc, P.E.

Manager – Industrial Building Systems and Commissioning Services

Mr. Serttunc has worked with a variety of project types including schools (K-12) and universities, commercial, industrial, and institutional buildings. Mr. Serttunc joined Axiom Engineers℠ in 1996 after earning a Master of Science in Mechanical Engineering at the Naval Postgraduate School in Monterey and was promoted to Principal in 2007. Mr. Serttunc is a Licensed Engineer in the States of California and Hawaii, and is a Certified Building Commissioning Professional and AEE Certified Energy Manager.

Sheila Tansill, Chief Financial Officer

Jay Kokler, P.E.

Branch Manager, Napa Office

Mr. Kohler joined Axiom Engineers ℠ in 2015 and brings a broad range of experience in consulting mechanical engineering including high performance sustainable design for commercial, educational, museums, theaters, and cultural centers. Mr. Kohler was a founding and managing partner of a 60-person consulting mechanical engineering firm located in New York and Connecticut. He is a Licensed Engineer in a multitude of states including California.

Sheila Tansill, Chief Financial Officer

Sheila Tansill, CPA

Chief Financial Officer

Ms. Tansill joined Axiom in 2001 and manages the company’s day-to-day financial operations and Human Resources. After earning a Bachelor of Science degree in Business Administration - Accounting from San Diego State University, Ms. Tansill gained public accounting experience with Price Waterhouse’s audit department (1983-1990) and industry experience as Controller of a mid-sized consumer electronics retailer in San Diego. She is a Certified Public Accountant and has over 30 years’ experience in accounting management and financial reporting.

In addition to the many licensed Professional Engineers and EITs on our team are staff members who are LEED Accredited Professionals or Associates, Certified Energy Managers, Certified Building Commissioning Professionals, and ACG Certified Commissioning Authorities. Many of our engineers are licensed in several states.
Many of our project managers are licensed engineers, and some have over 20 years experience in the industry. Resumes can be provided as necessary to show our experience in a wide variety of disciplines and project types.

Our Capabilities

We cut to the heart of the matter and get inside our projects. We understand how the equipment we select really works. We are not “catalog” engineers specifying “black boxes”. We have designed complex, one-of-a-kind systems, processes, and machines successfully for over 45 years. We provide real, not “paper” experience. Because our employees have many years’ experience with us, each listed reference project is what we call “real company” experience. The people who did a project 10 years ago are likely available today for your current project.

From industry standard tools... to advanced engineering techniques...

Our CAD capabilities include AutoDesk’s AutoCAD, REVIT, and Architectural Desktop, as well as Bentley’s Microstation SE. Our design and engineering teams are fully trained and comfortable with all of the challenging aspects of CADD-based document production and can support custom-developed solutions and requirements for our clients’ exclusive needs.

Axiom Engineers℠ offers streamlined and standardized production and design procedures
– from system sizing to specification to drawing production – that provide a high degree of quality, consistency, and efficiency.