The answer to your question is what makes ISEC WM services unique and demanded by clients.
Investing as you have realized has some risks. And these risks are related to high volatility in markets. There are other risks that investors should consider in their activities.
Professionals from ISEC WM know to manage assets so that volatility and other risks don't affect profitability.
This is the core value of this company. Therefore, it is attractive for investors.

As for the process itself, I can assume that specialists of this firm analyze financial markets and, understanding changes in markets, they change structure of investment portfolio. Thus they manage to distribute risks between several financial instruments.
They do it correctly and it leads to that the risks are reduced and profitability of such investment portfolio increases.

As far as I remember, first things first, these guys keep money in the segregated accounts. So you have a full ownership of your funds and they aren't mingled with other sums whether these are money of other investors or the company's own ones.

Secondly, when it comes to volatile markets and certain upheavals, experts from this company take the liability to rediversify risks via redistributing funds into different assets. If the biggest part of your cash is kept in those assets which have high risks, like stocks, then they would likely reroute this money to safer assets like bonds or fixed income securities.