Multiple technicians on per job is possible with the Pooltrackr App.
To begin, click on the 'Jobs' icon on the icon bar.
On "Calendar View", choose the necessary Job that needs additional technician. An overlay window will appear on the screen sliding from the right.
On "List View", choose the necessary Job that needs additional technician. You will be directed to this screen which will allow you to add more technician on the job that you pick.
Dragging the job for the primary tech to a new time slot will move the secondary tech accordingly:
To remove the primary tech, drag the secondary tech onto the primary tech's slot: