You sure can! In fact it is highly recommended that you continue your certifications as you continue to grow in your company and in the industry. To continue learning is where success begins. Is there help to prepare for the exams? An actual test booklet is included in the exam registration fee, which provides a full description of the test stations. In addition Installation & Maintenance training manuals can be purchased for $80.00 each. (Please allow 2-3 weeks for receipt of the manuals) There are preparation seminars available through Landscape Ontario and there are free of charge orientation classes approx 3-4 weeks prior to the practical exams.