function jobCreator(jobTitle) {
    return function(prefix) {
        return prefix + ' ' + jobTitle;
    };
}

var marketer = jobCreator('Marketer');
var developer = jobCreator('Developer');

console.log(marketer('Head'));  // Head Marketer
console.log(developer('Lead')); // Lead Develoer
console.log(developer('Senior')); // Senior Developer