Work with a purpose. . Management & Training Corporation is now hiring career-minded people to assist with securing the safety of our community while positively impacting the lives of those on the inside. Position. Mailroom Supervisor. Facility. Gregory S. Coleman Unit. Location. 1400 MLK Industrial Blvd Lockhart, TX 78644. Rate of pay. $15.00 per hour. Work schedule. Full-time. Days. Monday-Friday. Benefit include. Health/dental/vision/life insu...