In the normal helicopter world I haven't seen one dispatcher!
Me neither. As a helicopter pilot for well over thirty years I've been required to do my own dispatching. I also do the liaison with the customer, carry out advance and immediate pre-flight planning. I find landing sites, gain written clearances and permissions etc. I also find hotel accommodation for myself. I prep the aircraft for flight. I tidy it, ensure it's clean, top up the lubricants, ensure it's refuelled, tow it out. There's no engineering support at base. Once I'm away from base it's all down to me anyway. When I get back to base, I ensure it's refuelled, tow it in and then carry out post flight admin work.
Many others do just the same.