Thanks so much for the info. The surgery was in November, however the radiation was not recommended until January, after the genetic lab tests came back. Rick factor 2 or intermediate. Since then I've had a scan done to look at my lymph nodes (negative). I'm told I will need another in 3 months since I opted out of the radiation. Seem strange to me that all the lab tests come back clean yet I'm still advised for adjunctive radiation. I 'm finally getting a second opinion next week.

Yep, I would definitely start asking the oncologist about chemotherapy options - from some quick reading, it appears that many SCC tumors have an excess of EGFR protein and there's a drug which targets this.

Below I'm linking a related research study to share with your oncologist. Note that the patients were in a much worse situation than you are. They couldn't have surgery to remove the SCC tumor and relied on the chemo alone - and a third of them were immunocompromised. You just need to keep any remaining cells from regrowing.