HELP:about introduce and my english resume

my name is ***, i graduted from *** univeristy in 2006,my major is IM&IS. in the same year,i entred into *** company,was a information specilist, i was in charge of the execution of the erp,supervising the condition of erp, and analyzing the data to support the sale of the next quarter.in 2007,i entered into the ***company, was a sales person.i was in charge of collecting information about customers through the tele calls and internet, visit the key person of my customers to get more important information , judge the sales opportunities,assist the GM to tender, do a better after-sales service and receive the money from the customers. as a sales person, i enjoy this job when i see my customers use my production

above is my introduction, i don't know that's right ?

i hope someone to give me some suggestion, thank you!!