From https://coderwall.com/p/vdy0uq

openiTermHere

on run {input, parameters}
   cd(input)
end run


on cd(dir)
    tell application "iTerm"
        activate
        set miniaturized of windows to false
        try
            set iterm to the last terminal
        on error
            set iterm to (make new terminal)
        end try
        tell iterm
            launch session "Default"
            tell the last session
                write text "cd " & (quoted form of POSIX path of (dir as string)) & " && clear && ls -l"
            end tell
        end tell
    end tell
end cd