There is no solid answer to the employment part of the question, but your criminal history record is a public record and is available to anyone who checks into it.
only in the USA
depends on the felony. If it is a class AAWT offense then you would not be able to find a job there. but if you murdered someone then you would just need a drug test.
Yes. Whether you'll be able to find employment or not, is a different matter.
If you have a felony, you can become a doctor. I did not find specifically an Oncologist. It does depend on your state. You would have to research the laws about doctor's licenses.
I cannot address your employment difficulty but I can set your mind to rest about the fact that NO state will allow you to do a 'blanket' expunction of your entire criminal record. Ohio is NOT unique in this respect.
You can get a CDL. The question should be one of whether you'll be able to find employment as a CDL driver with your record.
There are organisations in Nevada like the department of employment which specialise in fact and figures about jobs and also finding employment for the state's citizens.
don't do it... you might be able to get a temporary job... but nothing that has a future...
One of the best places to find information concerning employment opportunities in Washington state is to visit the government website for that area. Indeed, many employment opportunities are available working for the government and are advertised on these sites, as well as links to employment agencies and local companies.
Employment law in California is unique to the state. Specific information on details would need to be discussed with a lawyer, preferably one certified by the State Bar of California in employment law.
State job search can be found in your local department of employment services office.
Yes, unless the record was sealed or expunged. Felony convictions remain on your record indefinitely.