Job Application Field Alignment Issue

Form alignment is first established by the styling of your theme.

Secondary is the display styling from Job Manager via the display.css

job-manager/css/display.css

You would need to select the code that you are interested in moding and add it to your Themes style.css

Use a tool like Firefox Firebug to determine what changes will be needed.

If you add it anywhere else an update will most likely wipe this out, including your theme if it does not utilize a Child Theme aspect.

Hope this helps