Ellen and Michael Hefter of Purchase are happy to announce the engagement of their son, Steven, to Risa Israeloff, a daughter of Cheryl and Lawrence Israeloff of Woodbury, New York. The future groom graduated from the Horace Mann School and Tufts University. He received a Master of Public Health from Columbia University and is a senior healthcare consultant for BDO, the global accounting firm. The future bride graduated from the University of Michigan and received an MBA from Cornell Tech. She is a senior consultant at Numerator, a data and technology company.