Southern Careers Institute’s Campus of San Antonio North: You’ll Leave With the Hands-On Training and Certifications You Need to Compete! Located on NW Loop 410, Southern Careers Institute San Antonio North is perfect for anyone looking for career training in and around north or west San Antonio. As the seventh most populated city in the United States, San Antonio is home to Sea World, Six Flags, and the famous River Walk district. SCI students enjoy a close-knit, family-like, supportive environment, even though the campus sits in the second most populated Texas city.