About us. L. Nothhaft & Son Fire Protection is a small business in Denver, CO since 1949. We specialize in commercial and industrial projects. L. Nothhaft & Son is an equal opportunity employer that is committed to diversity and inclusion in the workplace. We prohibit discrimination and harassment of any kind based on race, color, sex, religion, sexual orientation, national origin, disability, genetic information, pregnancy, or any other protecte...
