Comprehensive Excel Task Management System

I am looking for a highly skilled Excel expert to design and develop a comprehensive, user-friendly task management and performance tracking system in Microsoft Excel.
The solution should allow efficient allocation, tracking, and reporting of staff tasks across departments, with both daily and monthly visibility.
Key Requirements:
1. Task Allocation & Tracking
Monthly view of all tasks assigned to each staff member
Daily task tracking with progress updates
Task allocation based on hourly workloads
Track:
Department
Employee name
Task description
Standard task completion time
Number of tasks assigned
Tasks completed per day
Pending task list
2. Performance Monitoring
Automatic calculation of task completion percentage (daily & monthly)
KPI tracking for each employee and department
Monthly performance summary dashboard
3. Dashboard & Visual Reports
Interactive monthly dashboard with:
KPI achievement graphs
Task completion trends
Department-wise performance
Clean and visually appealing charts and summaries
4. Leave Management
Track leave accruals for each employee
Monthly leave balance calculation
Integration with task tracking (to reflect availability)
5. Task Management Features
Ability for managers to:
Add/edit tasks
Include notes and comments per task
Easy data entry with dropdowns and validations
Automated calculations and minimal manual input