Yes, You want to secure the database. I'm not sure what version you're running but if you're running the latest, Go to tools > workgroup administrator and create a workgroup. Once you've done that, goto Security > User and group accounts and create an account for yourself and assign yourself to the admins group. Then remove the default "Admin" user from the "Admins" group so it only belongs to users, Then go ahead and assing a password to the "Admin" user.
Close the database and go back in and you should be prompted for a password, Just leave the field blank unless you've assigned yourself one and then goto tools>security>user level security wizard and follow the instructions and your database is now secured. After that you can go back into user and group accounts and create accounts for personnel and after that you can set their permissions to the database elements by going to tools>security>user and group permissions.
Note: You'll also need to create a shortcut for each user to access the database through the workgroup, which looks something like this.
"C:\Program Files\MicrosoftOffice\MSACCESS.EXE" "C:\mydatabase.mdb" /WRKGRP "C:\secure.mdw"
Just copy and paste the path to Access on your machine for the first part, then copy and paste the path to the database for the second part and finally copy and paste the path to the mdw file that you created for the last part.
Hope this helps.