WARNING- Customer support people proceed cautiously!

If you are considering working for EMC in a customer technical support role, proceed with an inordinate amount of prudence and interrogation.

I worked for them in Global Customer Service, supporting a backup product for nearly 4 years. I was awarded level 4 Markets And Channels VP recognition for service onsite in Brasil with strategic customers. This was the highest recognition level available to engineers. I was promoted several times, trained at Oracle, a key contributor, expert troubleshooter, team lead, trained others, scripted tools, etc.

Toward the end of my tenure there, management decided to cut staff in the oncall rotation, and displace the already excessive and intensive workload onto 1 person
versus the former 2 person tiered model, meaning the 1st person could have an escalation/relief path to someone else. What this meant was that oncall would come up much more often and be doubly as intense, stressful and invasive on weekends and nights.
They asked the most talented people to participate. I was chosen.

I refused to do it, citing a valid medical condition- sleep apnea.

What happened 3 weeks later, was that management and HR concocted a series of minor infractions and resultant warnings as an HR formal trail that finally culminated in my dismissal.
After 4 years of this level of service, I was summarily let go with 2 weeks pay in lieu of notice- in effect cheated out of my severance.

They will always be an a****** company in my book.
They play hardball all the time. They are chiselers and pay under market. You will work too hard, risk damaging your emotional and physical health and, guess what- get paid much less than other companies that treat you with dignity.
If you're average talent but cutesy, salesy, charming with managers, and palm work off on the hard workers, you will do well there.
If you're very bright, hard working, low key, focused they will grind you like you've never experienced before.