I have 30 years of experience and specialize in the field of history of technology with specific knowledge in the areas of asbestos in building codes, engineering standards and engineering testing history. I have published on such topics as asbestos as a fire-resistive material, history of building codes and engineering standards, and history of medicine and sexuality. I have testified 9 times on topics such as boiler insulation in building codes, pipes and their gaskets in building codes and engineering standards for boiler seals.