I told him that if he is noticing those attitudes, so are his customers. Most skills can be taught, attitudes cannot. Pay very careful attention to the demeanor, attitude and enthusiasm of job candidates. If there is even the slightest doubt in your mind about their sincerity don't hire them. Seriously consider terminating employees who continue to be extremely negative even after they have been given several opportunities to improve their behavior.
Attitudes are contagious.
No matter how productive an employee is, consistently negative behavior such as criticizing co-workers or the company can take down the morale of an entire work team. The CEO, president or owner needs to reserve two hours per week to visit employees throughout the company and personally meet them and acknowledge their individual efforts. Do not schedule the visits for the same time each week, or they will become predictable and lose their impact. Take time to chat for a few minutes with each of your employees, and be sure to listen to their suggestions. Hold employees, particularly senior managers, accountable for their attitudes and behavior toward their co-workers.