Canada’s Public Service Commission prepared a back-of-the-envelope survey of labour mobility last year, and identified the civil service professions that are experiencing the most turnover and volatility. The results were reported in the Ottawa Citizen this morning.
Not surprisingly, the official category for communications specialists and public relations flacks was among the top five (of something ridiculous like 40) classification groups. Communications specialists, economists and human resources specialists seem to be able to write their own ticket in the public service - as long as they have appropriate qualifications and relevant work experience.
This means that there is a fairly fluid system of supply and demand for their services. Communications specialists can move from position to position, and department to department, unlike most other professions, which tend to be more inflexible. (After all, where are those woodlot specialists, marine engineers and toy testers going to go?)

Some of this movement is between Communications Branches, the Deputy Minister’s Office and the Minister’s Office. After all, communications specialists have specific skills as aggregators and analysts of information that are much sought after by these higher offices.
Do we have any statistics about the movement of public servants between the public service and Federal Minister’s Offices? Well, you’re in luck! The PSC just completed an audit of such movements, as undertaken between April 1990 and January 2006.
A total of 157 public servants moved between departments and Minister’s Offices in that time. The PSC decided that 99 of those staffing actions were of little risk - but that the other 58 warranted further investigation. Here are those 58 positions, broken down by movement among classification groups that require a post-secondary degree:

Okay. 19/58 for the IS group. That’s 33% of the movement. Considering that most Minister’s offices have a communications assistant, a press secretary, and a Director of Communications, that’s a strong statement. Strong enough to elicit this comment in the audit:
“Approximately 44% of the public servants included in the audit came from the IS or ES classification groups. These groups are often responsible for aspects of communications or policy advice within an organization. Because of the nature and profile of their duties, public servants in these types of positions or in higher-level positions who work in a minister’s office may present a greater risk (real or perceived) to political impartiality when returning to their home departments.”