About Us

Established in 1993, we provide design services to a wide variety of clients throughout Northern California.

We work closely with our clients to define a specific scope of services and then work diligently to complete the work on time and on budget.  Quality control is an ongoing effort throughout all project phases.  Coordination and communication with our clients, other consultants, and approving agencies is considered of utmost importance in the operation of HDK Associates.  The majority of our work is generated from repeat business within our existing client base.  We pride ourselves on our integrity and our focus to provide personal attention.


Our Principal Team

Daniel W. Hugens, P.E.

Principal Owner

Dan established HDK Associates in 1993 as a consulting engineering company with a goal to provide excellent engineering solutions for difficult or unusual engineering problems.  Dan has more than 30 years design and project management experience providing engineering solutions to a variety of industries:  aerospace, semiconductor equipment, biotechnology, water and wastewater, construction and the solar industry.  He has excellent organizational and communication skills that allow him to be effective in leading multi-disciplined engineering teams.

Education: B.S. Mechanical Engineering 1980, California Polytechnic State University, San Luis Obispo

Professional Registration:
• Registered Mechanical Engineer CA Certificate # 22953
• State of CA General Contractor License # 552773

• American Society of Mechanical Engineers
• American Society of Heating, Refrigeration, and Air-Conditioning Engineers (ASHRAE)


Kathleen J. Hugens, P.E., LEED Green Assoc., QSD/P

Principal Owner

Kathy has joined Fuscoe Engineering, Inc. to lead their new Danville office. Please visit their website to follow her.

Contact HDK Associates