Nuclear and Oncology are two different fields within pharmacy. Nuclear is a little easier to discuss so I'll take that one first.
Nuclear pharmacy is really unique. I think the pfizer career guide has a section on nuclear pharmacy?
http://www.pfizercareerguides.com/default.asp?t=book&b=pharmacy
Secondly nuclear pharmacy may or may not require residency training. Given that not as many people go into to nuclear vs other fields of pharmacy, many nuclear jobs are willing to provide on the job training at full pharmacist pay while you prepare yourself for a career in nuclear pharmacy and certification as a board certified nuclear pharmacists (BCNP) or some other formal type of certification. This certification is pretty much mandatory to get and maintain a job in nuclear pharmacy for obvious reasons (i.e. safety regulations in handling the various products). So the residency route isn't as applicable since well paying apprenticeships are typically offered.
Nuclear pharmacy is really more about compounding various radioactive compounds used in diagnostic procedures and the hrs are really kind of odd depending on how big the company is. A lot of the places have you working from like 2AM - 10AM or odd hrs like that as the products have to be prepared early in the morning and sent to the hospital/facility for testing procedure early in te morning/afternoon. You can't make too many things ahead of time since the most of the products have really short half lives. Pay is pretty good (supposedly competitive w/ retail & hospitals). I don't think there is any pt contact if that interests you.
There are some residency programs. I know Walter Reed has one, but I think even they pay you regular pharmacist pay, but then again I think they require their residents to join the army.
For info about BCNP check out
www.bpsweb.org
Please see the following links for possible positions in nuclear pharmacy and just some more general information:
http://nuclearpharmacy.uams.edu/nuclear_pharmacists/jobpostings.htm
http://rxinsider.com/nuclear_pharmacy.htm
www.accp.com or
www.aphanet.org (and use job search engines)
Oncology is quite different. It is certainly more clinical/research oriented which typical resolves around safety in preparation and dose monitoring of chemo products, control chemo induced side effects (often nausea/vomiting, pain management, toxicities (variation in WBC vs anemia, etc). The research side can involve doing kinetics trials. Oncology requires 2 yrs of residency training plus a fellowship for those interested in the research aspects. Certification is also highly desired as a Board Certified Oncology Pharmacist (BCOP).
For info on board certification see
www.bpsweb.org.
For info on residencies see
www.accp.com or
www.ashp.org.
For info on jobs see
www.accp.com and use job search engine.
I hope this helps.