Paragraph not indenting properly.

Here is the code I'm using
\documentclass[a4paper,10pt]{article}
%-----------------------------------------------------------
\usepackage{geometry}
\usepackage{url}
\fontfamily{SansSerif}
\selectfont
\usepackage[T1]{fontenc}
\usepackage{color}
\definecolor{mygrey}{gray}{0.75}
\textheight=9.75in
\raggedbottom
\setlength{\tabcolsep}{0in}
\newcommand{\lsep}{-0.5cm}
\renewcommand{\labelitemii}{$\circ$}
\pagestyle{empty}
%-----------------------------------------------------------
%Custom commands
\newcommand{\resheading}[1]{{\small \colorbox{mygrey}{\begin{minipage}{0.975\textwidth}{\textbf{#1 \vphantom{p\^{E}}}}\end{minipage}}}}
%-----------------------------------------------------------
\begin{document}
\resheading{\textbf{OBJECTIVE} }\\[\lsep]
\\ \\
\indent
To secure a position where Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah. Blah.
\end{document}
Can anybody tell me whats the problem

\noindentto your\newcommandlike this\newcommand{\resheading}[1]{{\small \noindent \colorbox{... – James Jun 19 '15 at 12:53\resheadingis very poorly designed, as is evidenced by your attempt to "correct" it afterwards by adding the\\[lsep] \\ \\ \indentafterwards. If it were properly constructed, you whould only need to write\resheading{OBJECTIVE}and then continue on with the textTo secure a position.... If you add\usepackage[showframe]{geometry}, you will see that both the line with "OBJECTIVE" and the line below it are indented; the subsequent lines are flush left to the left margin of the document. Do you mean you want the 1st line starting "To secure" to be "double indented"? – jon Jun 19 '15 at 13:42http://s12.postimg.org/5a6s36k6l/Capture.png
If I don't indent then "Objective" will displace littlebit to left. I 've to keep it in centre.
– Atinesh Jun 19 '15 at 14:34\usepackage[showframe]{geometry}. It will then be clear how all the elements are related to one another. – jon Jun 19 '15 at 14:42