that serves the petrochemical, fertilizer, and refining industries. Privately owned and operated by Engineers, Sigma's culture... attention to detail WHO WE ARE: Founded in 1987, Sigma is a professional multi-discipline engineering and design company...
by Engineers, Sigma's culture empowers employees and clients to choose relationships and projects that fit our values... of contact between project stakeholders, process engineers, and other departments to ensure alignment of project scope, schedule...