If you are a freelance writer working for this company am I able to request you by name or does the writer pick there papers?

Do freelance writers work for both themselves and for other companies?

Do any freelance writers on this site work for themselves as well as other companies? If so how does one get a hold of them? I know it is against forum rules to give specific e mails and advertising but if someone could point me in the right direction that would be great

Thanks