About SIGMA
Established in 1985 by engineers with new ideas for servicing the water and wastewater industries, SIGMA has grown into a global company with a major presence in the U.S and Canada, and loyal customers around the world. We continuously strive to cre...
Verify SIGMA Employees
Truework allows you to complete employee, employment and income verifications faster. The process is simple and automated, and most employees are verified within 24 hours. Verifiers love Truework because it’s never been easier and more streamlined to verify an employee, learn more here.
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