The term PT. OF ICBM stands for 'Project Officer of Intercontinental Ballistic Missile'. This is a job title that is typically held by a military officer who is responsible for overseeing the development and deployment of intercontinental ballistic missiles. The job requires a high level of technical knowledge and expertise in order to ensure the safety and accuracy of the missiles. The Project Officer is also responsible for ensuring that all regulations and protocols are followed during the development and deployment process.