What is a non-elected officer and where can I find some interesting facts?
The Clerk of the House of Representatives

DPS Auspic
Description
The Clerk, wearing a traditional black gown, leans in to speak to the Speaker of the House of Representatives in his chair. The Clerk sits at the desk in front of the Speaker where they keep sand timers and books including the standing orders – rules – of the House of Representatives.
Permission should be sought from DPS AUSPIC for third-party or commercial uses of this image. To contact DPS AUSPIC email: auspic@aph.gov.au or phone: 02 6277 3342.
Thank you for your question, Lee.
In addition to members of parliament—who are elected representatives of the people—non-elected officers also work in the Senate and House of Representatives. Non-elected officers are parliamentary employees who have a range of important responsibilities and duties to make sure the Australian Parliament can do its work.