Although my company has de-emphasized certification, I have over 13 years of experience with Lotus Notes and Domino. I'm currently responsible for a mix of Domino servers running Releases 8.5 and 6.5.
I am currently certified as a Lotus Certified Notes Specialist, the highest level of certification available for Notes release 3 (CLP - Certified Lotus Professional).
I also have extensive experience (4+ years) with Notes Release 4, and I am currently certified as a CLS - Certified Lotus Specialist for Release 4). I have a number of years of experience with Notes/Domino Releases 5, 6.5 and 8.5.
Lotus Certified Notes Specialist (R3)
Lotus Certified Notes Consultant (R3)
Lotus Certified Notes Administrator (R3)
Lotus Certified Notes Developer (R3)
Certified Lotus Specialist (CLS) (R4)
Domino Messaging Administration 4.6