PNG Cleanup for Mascot Artwork

I have between one and ten mascot-style artwork renderings that need a quick but precise background removal. Every detail in the illustrations must stay intact; I only want the background gone so the final files sit on a fully transparent canvas.

Scope of work
• Open each supplied file in Photoshop (or an equivalent pro-grade tool).
• Remove the background cleanly while preserving all linework, shading, and colour nuances.
• Deliver each image as a high-resolution PNG with transparency, ready for DTG or DTF printing.
• If the source file is not already a PSD, convert it to the correct working format before editing.

What I’m looking for
Someone who moves confidently in Photoshop, understands print-ready transparency requirements, and can turn around a small batch fast. This is a short assignment, but if your attention to detail shines through I’ll keep coming back with more artwork cleanup tasks.