A company assigns employee identification numbers based on a complex system. The first digit represents the department (1 Sales, 2 Marketing, 3 IT, etc.), the second digit signifies the employee's seniority level (1 Junior, 2 Mid-Level, 3 Senior), and the last two digits are a sequential number starting from 01 for each department and seniority level combination. Identify the employee with the most experience if the following IDs are observed.
A1203
B2110
C3305
D2308