"Having said that, I enjoyed every minute of my time and I got a degree of job satisfaction which I am sure was far greater than the majority of my colleagues"

Len G. Murray is revealing his satisfaction with his task and the amount of satisfaction he got from it. He is indicating that he enjoyed his time and felt a higher degree of complete satisfaction than his associates. This might be due to the fact that he was passionate about his job and felt a sense of accomplishment from it. He is also suggesting that his colleagues might not have actually felt the same level of satisfaction as he did. This could be due to the fact that they were not as passionate about their task or because they did not feel as achieved. In General, Len G. Murray is expressing his gratitude for his task and the satisfaction he got from it.