Casual Gathered Dungarees Pattern Design

I'm seeking a skilled pattern maker to create a graded PDF pattern for casual gathered straight leg dungarees. The pattern should be available in six sizes (small to large) with both long and short options.

Essential Features:
- Pockets
- Adjustable tie straps
- Elastic waistband in back

Fabric Preference: Cotton

Ideal Skills and Experience:
- Expertise in creating graded PDF sewing patterns
- Experience with casual wear design
- Proficiency in incorporating adjustable design elements like straps and waistbands
- Familiarity with cotton fabric properties and handling