How do i get my Engineers Cert Back?

Cant belive im going to ask this but here we go!

I was once a CNI in netware versions 4.11 through to 5.1 including
Zenworks3 and groupwise6..i think it was 6 anyway!

Im considering a return to certification but everything seems to have
changed!

Can someone tell me what i have to do to be an Engineer again?

Thanks

James Brennan