As a civil engineer, your primary duties revolve around the conception, design and management of the construction and upkeep of a vast array of structures and infrastructures. This includes everything from roads and railways to airports and bridges and even extends to harbours, dams and irrigation initiatives. You'd also be involved in shaping essential services such as power plants and water and sewerage systems.

Yes, civil engineering is in high demand in Australia. With ongoing infrastructure development and expansion across the country, skilled and experienced civil engineers are needed. It's a profession central to Australia's growth and development, making it a promising field for those seeking steady career prospects.

The "best" career in civil engineering largely depends on your interests, skills and career goals. The field offers a range of pathways from design engineering to project management. Some engineers may find fulfilment in hands-on roles like site engineering, while others may prefer the strategic oversight of project management. 

Salaries for civil engineering jobs can vary considerably depending on criteria such as experience, skills and location.

Typically, civil engineer jobs that require more experience or specialised skills, such as senior civil engineers or civil project managers, tend to command higher salaries. However, it's worth noting that regions with higher costs of living or greater demand for civil engineers, like major cities or booming construction areas, may also offer higher wage potentials.

Preparing for civil engineering job interviews involves:

• Research — Understand the role and company by studying the job description and the company's projects.
• Technical preparation — Brush up on your technical knowledge and be ready to give examples of your work.
• Behavioural preparation — Be ready for behavioural questions about how you handle challenges or work in a team.
• Practical considerations — Plan your route to the interview, dress appropriately, and bring all necessary documents and references.
• Questions for the interviewer — Think of meaningful questions to ask the interviewer. Not only does it show your interest, but it can also help you gauge if the role is right for you.