Former US DHS CBP ICE TSA Officials - World Cup SEAR-1 SEAR-2 Security

I am working on a story about security plans for the upcoming World Cup in the US and looking for former DHS, CBP, ICE, TSA officials who talk about what goes into planning for events like this. What does it mean to be a SEAR-1, SEAR-2 event and what does DHS contribute in those cases? Scanners, counter-UAS, intel gathering? If this is you, please reach out on messages or email me at [email redacted]. Thanks!