You could use a variable:

info="$(getInfo $SERVICE)"
SERV_NAME="$(head -1 $TMPFILE <<<"$info" | sed -e 's/ $//')"
...

From man ksh:

<<<word       A  short  form of here document in which word becomes the
              contents of the here-document after any parameter  expan-
              sion,  command  substitution, and arithmetic substitution
              occur.

You could use a variable:

info="$(getInfo $SERVICE)"
SERV_NAME="$(head -1 $TMPFILE <<<"$info" | sed -e 's/ $//')"
...

From man ksh:

<<<word       A  short  form of here document in which word becomes the
              contents of the here-document after any parameter  expan-
              sion,  command  substitution, and arithmetic substitution
              occur.

Advantages include:

• Enables parallel execution.
• In my experience this is tons faster than temporary files. Unless you have so much data that you end up swapping it should be orders of magnitude faster (only barring HD caching buffers, which might be about as quick for small data amounts).
• Other processes or users can't mess up your data.