The principle behind evolution is that it is undirected. The religious/evolutionist debate is argued because religion believes it is directed while evolutionists believe it is the complete opposite.
Genetic engineering performed by scientists is directing its outcome. The effects of it may or may not directly effect other life forms including us. If it does effect them, it is still directed because scientists initiated the process through genetic engineering.
Do you believe that pollution created by humans is evolution? The peppered moth that turned from white to black is labeled as evolution. This situation was a response to its polluted environment by humans.
We can fool ourselves into thinking that the moth evolved by natural selection but was this natural? No!
It is directed (human caused) evolution by unnatural selection. On the other hand, all evolutionary changes result from a changing environment. The difference is humans evolved with a conscious and the awareness to understand the consequences of their actions. Prior to us, no other life form could be held accountable for their actions. Which is why evolution could remain firm in the belief that life is undirected.
If and when genetic engineering becomes successful in manipulating lifeforms it will become directed and you can no longer call it evolution in its current definition.