Whether campaigning for President Obama or supporting stem cell research, Bob Clark, founder and executive chairman of contractor Clayco has never shied away from speaking his mind. 

Contractors, construction industry groups say guidance contradicts administration's desire to encourage employees to get vaccinated.

U.S. production facilities for COVID-19 vaccines nearing approval for Pfizer, Moderna and Johnson & Johnson are delivered by EPC contractors. But supply chain availability has been a tricky process.