Sadly yes, the cost of your insurance will be affected by your occupation. It is just one of many factors that the insurance company will use to work out how much to charge you.
However, you mustn’t try to change your job title to reduce the price of your quote. You could get caught out here, and even end up paying more!
Also, if your occupation means a lot of driving, you can expect a higher premium – due to more time on the road!