This is from avantair.com. Select "about Avantair", then "career opportunities" and finally "pilots".

Minimum requirements:
• 2500 Total Time
• 1000 Multi-engine
• 250 Instruments
• 100 recent hi speed multi engine turbine or type rating
• 250 Hours in the past 12 months
• Airline Transport Pilot
• First Class Medical
• FCC Restricted Radio/Telephone Permit