What are the visa & residency requirements in Dhahran?

"In order to obtain a visa to enter Dhahran, applicants must submit a valid passport, a completed visa application form, and a copy of their passport photo. Additionally, applicants may need to provide proof of financial stability, a letter of invitation from a sponsor in Saudi Arabia, and a medical certificate. The visa application process can take up to two weeks to complete. In order to apply for residency in Dhahran, Saudi Arabia, applicants must have a valid visa and must submit a completed residency application form, a valid passport, a copy of their passport photo, and a medical certificate. Additionally, applicants may need to provide proof of financial stability, a letter of invitation from a sponsor in Saudi Arabia, and a police clearance certificate. The residency application process can take up to two months to complete," said another expat in Dhahran, Saudi Arabia.