I have completed MCITP and CCNA what can I do next?

learn CCNA voice or CCNA security

That depends on what are you willing to be, if you prefer system administration CCNA is enough for you and you can extend your knowledge in microsoft or Linux through other courses (upgrade to MCSE2012, RHCE, Microsoft exchange, ....etc.)

but if you are more interested in network administration then it's prefered to proceed in Cisco courses (CCNP & CCIE) and don't ignore the importance of voice and security :D

Put your hand on real world technology and get some experience bro.

You can upgrade your skill more with Oracle SQL coz you gonna need it on several things ,,,or you can be expert with Microsoft lync

If you are really interested then goes for CCNA > CCIE and also go for MTA certification

You must study at least on of the advanced technology like Messaging (Exchange, Lync) or System Management (SCCM, SCOM...)  

u must go for CCNP then for CCIE

Those are both good general certifications.
The question about next steps leads to a discussion about specialization.
You can specialize in databases, security, system architecture, etc.

Pursue your career in the one that you liked most.
Then study more in whichever one and get specialized in one area.