M.C. Maas Safety Management, L.L.C. Share: SafetyConsultants M.C. Maas Safety Management, L.L.C. 460 Fawn Hollow North Sioux City, South Dakota 57049 (605) 499-9226 LinkedIn Hours: Call 605-499-9226 About Map About Providing consulting services focused on Workers Comp Claim Oversight, Safety & Risk Management. Partnering with companies to meet their safety goals, minimizing costs and reducing EMR Rating. Directions Call 605-499-9226 What's Nearby? Distance: 5 10 15 20 25 50 mi.