We have two groups. Some people are specialists in their field, be it aviation, rail, marine or pipeline transportation. We also have a group of engineers and experts on human factors. These people are assigned where they are needed to provide the appropriate technical and scientific expertise. They go where they are needed, depending on the investigation.
As to retirements, the average age in our agency is rather high compared to the rest of the public service because we hire people with many years of experience in industry. Extensive knowledge of the field is needed to conduct investigations. For instance, we can't send a university graduate to conduct an investigation in the field. Because people join the agency at the end of their career, turnover is always high. Attrition is fairly high and fairly consistent. Through succession planning, we try to manage the turnover and make sure adequate resources are in place.