One way to drill a rock face is to abseil down and go for it (hand scaling) . However there are safer ways of doing it. Here are two different contrasts.  A good old scale down the wall system (picture on the left) and a unique drilling system which increases user safety, comfort and was able to increase productivity rates (Watch VIDEO here ). 

Engineered slopes require stabilization to ensure their long-term viability and reduce localized slope failure from erosion and rockfall.  The drillers place tensioned steel bar into the rock face increasing the normal force friction and shear resistance along discontinuities and potential failure surfaces. They are applied in a pattern or in a specific block area. 

So it requires good access to the rock slope. Visible bolt ends and hex nuts may need to be covered with shotcrete to improve aesthetics (by the way my first dissertation was designing a robotic shotcreting rig) . The hand scaling is the most common and inexpensive form of scaling. 

Your options are workers will rappel from the top of the slope , work out of a crane or man lift basket scaling a slope at one time. But have a look at the video its a better method as its safer and can become highly productive for the contractor. 

VIDEO LINK 

There are many free online education courses available. I've tried a few and there are sites which simply give you free training. One site I like to visit is Khan Academy on youtube. 

I came across Alison'c certified courses and was very impressed with the content as I sampled a couple courses for a test run. the Diploma of Sustainable Development and Diploma of Systems Engineering. 

The founder says to have his course certified by a third party will cost students money. He was recently in Australia and I quote a part of the article from his speech.

 "Last week, Feerick asked an ADC Forum of education executives and entrepreneurs what they would trust more when picking a hotel: being a member of the local hoteliers federation or having high scores on TripAdvisor? The room went for TripAdvisor and Feerick had his gotcha! moment. If credibility is based on market feedback, then formal accreditation could face a challenge.


I personally think its not an equitable comparison of tripadvisor ( by the way I use trip advisor a lot) and a formally recognized certified education. I think third party certification as well as the location of the institution is important and establishes a level of quality at the same time I think courses like Alison are valuable but they are still a long way off being a viable alternative for employers.