dhammond3
Osteoarthritis responds well to exercise and there is good evidence that exercise improves function so you can do more with less pain. In fact exercise not only keeps you managing your daily activty better but it may even have some positive effects on the disease process, slowing down the rate of degeneration and improving the health of the locomotor system.
Patients often respond well to exercise and it is way too under-prescribed. A balanced exercise programme should include progressive resistance training of the knee muscles and other lower limb muscles. There should be an aerobic exercise component and and muscle imbalances should be addressed.
There is also some evidence that an active programme along with manual therapy to the joints can really help. If you want to see some evidence for such an approach I can send you some links to the literature.
One key thing is keeping your weight at an optimal level. I am not saying if you are carry too much weight but this greatly increases the stress on the knee. People often get into a vicious cycle of curtaining physical activity due to pain and discomfort and therefore burning up less fat.
Given your type of work you should find such a programme would greatly improve your ability to keep on your feet and manage the physical aspects of the job and by the end of the day you would feel much better and more energised anyway. Does your medical insurance cover physical therapy? A PT who has a gym or is connected to a gym would be ideally suited to helping you. It is better to get help with a programme so that joint issues are properly addressed and the programme is more likely to be both safe and successful for you.