Digital Circuit Designer for boat bilge alarm System

I'm seeking an experienced digital circuit designer to create an alarm system for a bilge pumping system on a boat. It’s a one off project.This project is for my existing business. When the 24 volt 15 amp bilge pump activates, from a float switch, a light and buzzer must sound... (Budget: £10 - £20 GBP, Jobs: Automation, Circuit Design, Electrical Engineering, Embedded Systems, Engineering, Prototyping, Signal Processing)