Andrew Gallen & Company Inc is a Certified Public Accountant located in Shillington, PA. We provide tax return preparation, payroll, financial statements, etc. for individuals and businesses. Please call or come by today! Andrew Gallen & Company Inc is a Certified Public Accountant located in Shillington, PA. We provide tax return preparation, payroll, financial statements, etc. for individuals and businesses. Please call or come by today!