corrected script is here:

#!/bin/bash
#Filename: Assignment Author: Luke Francis
quit=n
while [ "$quit" = "n" ]
do
clear
echo "OPERATOR ADMINISTRATIVE TOOL"
echo "Please enter your password:"
read password
if [ $password -eq 0600519 ]
then
clear
echo "1. User Information"
echo "2. Network Connectivity"
echo "3. Processes"
echo "4. System Information"
echo "5. Hardware Utilization"
echo "Which option do you require?"
read menunumber
case $menunumber in
1) echo "USER INFORMATION"
echo "1. Registered Users"
echo "2. Disk Usage"
echo "3. Last Logins"
echo "Q.Quit"
echo "Which option do you require?"
read menunumber2
case $menunumber2 in
1) awk -F: '{print $1}' /etc/passwd
echo "Hit the Enter Key to continue"
read junk;;
2) du
echo "Hit Enter Key to continue"
read junk;;
3) who
echo "Hit Enter Key to continue"
read junk;;
Q|q) quit=y;;
*) echo "INCORRECT PASSWORD"
sleep 1
esac
esac #I added
fi #I added
done
echo "Thank you for using the Operator Administrative Tool."


You missed to close case and if statements (see mark I added)