I woke up this morning to a nice email from USCIS after reporting Optum on Thursday to USCIS for H1B fraud. I filled out this form.
https://www.uscis.gov/report-fraud/uscis-tip-form
Three people were on the email chain from USCIS. They were very eager to talk to me and we have a tentative meeting scheduled for Thursday morning. I encourage you to send a report yourself if you feel like you were targeted or RIFed by H1Bs.
IMPORTANT: I confirmed talking to them in good faith does not effect or nullify a severance agreement or payment. Optum receives government contracts they must follow immigration laws.