Awards and Certifications Corner Alliance has been rated at CMMI maturity level 3 for services. Corner Alliance, Inc. is committed to improving our environment through the effective and efficient implementation of an Environmental Management System. Corner Alliance is ISO 9001 certified. Corner Alliance is a proud alumni of the Goldman Sachs 10,000 Small Businesses Program. Corner Alliance’s workplace culture is a top priority and is proud to have been awarded the Society for Human Resource Management’s “When Work Works” Award.