Congrats to you n ur ogranisation on completion of its 10 years.
For the welcome speech you may give a warm welcome to all who hv attended and couldnt attend the annual event, you may thank the management for the opportunity along with updates about the co. trailing 10 years performance and the achivements.. the hits and the misses.
Apart from jokes you may also include small skit for entertainment.
Tag line : 10 ka Dum.
All the best...gud luck !...SAVIO.