All those mentioned are nice to haves but what the service companies want are those that keep the badges in place. Citrix, CommVault, HP, and the whole plethora of 'new' Microsoft competencies are driving what many employers want and many of the ones you mention are very much secondary to that. There is a split in requirements between providers and consumers that isnt dealt with here. As someone who deals with technical recruitment for my company I wouldnt be all that interested in much thats been stated as essential here.