Details about government jobs or in Teaching profession in Engineering or Architecture after Bachelor in Architecture and master of engineering?

I want to do PHD. But I am not able to decide the Branch in which I should do the PHD.
The two options in front of me are 1) CIVIL & 2) ARCHITECTURE.
My previous qualifications are as follows:
a) HSC - MARCH 1996
B) BACHELOR OF ARCHITECTURE - MAY 2001
c) MASTER OF ENGINEERING - DEC 2002
(TOWN & COUNTRY PLANNING)
d) AT PRESENT I AM WORKING AS A DEPUTY PLANNER IN CIDCO ORGANISATION SINCE LAST SIX YEARS.

So please suggest me the branch.
My future Plans may be Government job or in Teaching profession in Engg. or Arch.
My main doubts are regarding scope in future & availability of GUIDE if I go for Architecture.
My email address : arkanchanr@yahhoo.co.in

Related Questions:

• Governemnt jobs after doing 3 years diploma in Architecture and 8-9 years of experience in this profession?
• What are government colleges in India which give engineering course in architecture?
• Which is better between B.Arch and B.Tech in Civil?
• Which is better between B.Arch and B.Tech in Civil?
• Architecture jobs in govt. field? How to find them and apply for them? Full detailed information about them?
• Education requirement for the post of Architect in Haryana Urban Development Authority or Punjab Urban Development Authority?
• Teaching job in Polytechnic in Lucknow having 21 years of experience in Architecture?
• Information on Engineering in Civil for governemnt job after passing in Architecture diploma in GPL and 3 years experience in Astro archineers?
• Am i eligible for JELET exam for Civil engineering after clearing diploma in Architecture from government recognized institution with 79%?
• How to apply for government job in Architecture/Design sector?