I’ve been an AS/400 adminstrator for more than 20 yrs. A little diversity does help though. If you can spend time as an RPG programmer, learn SQL, understand UNIX basics or have DBA skills will all make you a more valuable as an admin. The major problem is that a large percentage of AS/400 shops are midsized companies with small IM staffs. More often than not the Operations Manager is also the system administrator. I landed my latest job as much for my AS/400 security knowlege and CISA as I did for my sys admin skill set. If you are with a fairly large company or corporation and they are willing to train you and wait while you train, it should go well for you. Lest I forget, admins get to do PTFs upgrades, DR test and System restores. Hope you like long days and all nighters.