Brian
under the 482 temporary skilled worker visa, the company is required to pay:
. the recruitment agency fee (often around $6,700);
. the migration agents fee (can vary, but our agent charges AUD$3,055);
. the Australian Government fees and charges for the visa (around AUD$2,750);
. the Australian Government's training levy ($4,800 for a business with a turnover less than $10 million and $7,200 for a business with a turnover in excess of $10 million)
This totals around $20,000
The candidate is required to pay for the skills assessment process, obtaining police clearances for the countries in which they have worked, the medical with the appointed doctor and provide evidence that they have at least IELTS 5 (IELTS 6 for an engineer). The candidate will also have to pay the airfare to Australia and to ensure that they have private health insurance that meets Immigration requirements.
Since the outlay for the employer is around $20,000 they will tend to only prioritise those applications where the candidate can provide evidence of their Australian skills assessment.
I apologise for going on about this point, but obtaining the Australian skills assessment is the first and most critical step before you put yourself on the market to Australian employers. This is because you are competing with the large numbers of Australian engineers, and the other permanent and temporary residents in Australia who are qualified engineers with an Australian skills assessment. You will not considered until after the Australian employers have exhausted the other candidates and decide that they do not have the skills and experience mix that they require.
The job boards, (Seek , Jora, Indeed) are all good, but they also include applications from a lot of international candidates who are not suitable and for whom the Ausralian employers does not know how good or bad the university is at which they studied or the relevance of the degree program:
. for instance, in Indonesia the engineering degree is 4 years in duration, but includes around 25-30 per cent of study time on subjects that are not relevant to being an engineer (ie english, religion, the state ideology and cooperatives education)
I would think that coming to Australia on a working holiday visa would be a good option (if you are of the right age). A number of employers engage working holiday visa holders on a 6 month probationary period and then seek to sponsor them under the 482 visa.  Irrespective, of the apporach if, the job that you are applying for in Australia requires you to work as an engineer, you have to be a qualified engineer in Australia (ie you must have obtained the Australian skills assessment !!)
cheers, Tony