Her Story
About Tessa
Tessa Drinnan, M.S., P.E., NCEES, is a senior forensic consultant and owner of TD Forensics LLC, a firm she has successfully led for nearly 12 years. With over 20 years of experience in forensic engineering, she specializes in building failure analysis, structural integrity assessments, construction defect investigations, catastrophe response, and expert witness testimony. Tessa has built a reputation for combining rigorous technical expertise with exceptional communication skills, enabling her to work effectively with insurers, attorneys, contractors, and homeowners across the United States. Tessa began her professional journey in pre-med but discovered her passion for engineering through mentorship and academic guidance, ultimately transitioning to forensic engineering. Her education includes a Master of Science in Civil and Environmental Engineering from the Colorado School of Mines and a Bachelor of Science in Engineering from the University of Colorado. Over the years, she has earned Professional Engineer licenses in 9 states and maintains continuing education to stay at the forefront of her field. Tessa has also served as an adjunct professor and frequently presents to national industry organizations, sharing her expertise in forensic investigations and engineering best practices. Beyond her technical work, Tessa is deeply committed to community service and philanthropy. As Program Director of Excalibur Outreach, she organizes large-scale initiatives such as community holiday events and annual turkey drives across Colorado. She has been recognized as a “Badass Women Engineer of Arvada” for her leadership and impact in a traditionally male-dominated field. Tessa attributes her success to her ability to communicate effectively, connect with clients, and assert her expertise in challenging environments, all while mentoring the next generation of engineers and advancing the practice of forensic engineering.
Her Interview
Ten minutes with Tessa
01What do you attribute your success to?
I attribute my success primarily to my communication skills and ability to connect with clients, including insurance companies, lawyers, homeowners, and contractors. While I have a strong technical background, it is my ability to write, speak, and present effectively that allows me to maintain trust and build lasting relationships. Additionally, I’ve learned to assert myself quickly in male-dominated, high-pressure environments to gain the professional respect I deserve.
02What’s the best career advice you’ve ever received?
My counselor suggested I consider engineering when I realized pre-med wasn’t the right path. Later, professors encouraged me to pursue forensic engineering, recognizing my aptitude and guiding me toward a specialized career.
03What advice would you give to young women entering your industry?
Be ready to establish your expertise immediately. Assert yourself, demonstrate your knowledge early, and develop strong communication skills. Prepare for the field’s physical demands and understand that being a woman in this industry often requires extra effort to gain respect—but it is achievable with determination and professionalism.
04What are the biggest challenges or opportunities in your field right now?
The biggest challenge remains the persistent gender bias in a male-dominated, physically demanding field, along with safety and hostile encounters on certain jobsites. Opportunities include educating others about forensic engineering, expanding professional recognition, and mentoring the next generation of engineers.
05What values are most important to you in your work and personal life?
Community service, helping others, mentoring and teaching, clear communication, and professionalism are my guiding values. I believe in giving back through philanthropic initiatives and fostering knowledge-sharing within my profession.
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