Obtain the current "Friend at Court," a booklet containing the rules of tennis, the code and USTA tournament regulations, or access it online at the USTA website. You will need to know and thoroughly understand the rules.
Join the USTA, a requirement for all USTA officials. Visit the USTA website to obtain information on membership and contact information for the chairman of officials in your area. Contact your USTA sectional or district chairman of officials to obtain information regarding umpire training and testing.
Become a provisional umpire, an entry level official. This does not require attending a USTA training course, but you may be required to attend a training session in your area and pass an open book test. Obtain a data card after completing the test, from your sectional chairperson. Fill it out. Have it signed by the chairperson. Turn it in to the USTA official's office indicating you have taken the test for the provision umpire classification. This will add you to the USTA's database of certified tennis officials.
Get involved in local tournaments to become familiar with USTA tournament and officiating regulations. Attend the required training courses and pass the written tests appropriate for this type of classification to get certified as a USTA line umpire. Officiate for a minimum of 10 days as a line umpire with a satisfactory evaluation. Keep a data card updated with the events you worked and have the event chief of umpires or referee validate your card. Turn in your card each October to your sectional chairman.
Maintain your USTA line umpire certification and work 20 days as a line judge at national, ITF, and professional tournaments with satisfactory national evaluations in order to become a national line umpire. Record all the tournaments and training sessions you attend on a data card. Have it validated by the chief of umpires or referee at each event you work and submit it to your sectional chairman each October.
Maintain your USTA national line umpire certification and work 50 days as a line judge at professional tournaments with prize money of at least $50,000 in order to become a professional line umpire. Some of the matches you work must have prize money of at least $150,000. Record the events you work on your data card, have the card validated and submit it to the national chairperson of officials.