According to the Occupational Outlook Handbook, "surgical technologists, also called operating room technicians, assist in surgical operations. They prepare operating rooms, arrange equipment, and help doctors during surgeries." (Source: Credo)
Surgical technologists typically do the following:
Prepare operating rooms for surgery
Sterilize equipment and make sure that there are adequate supplies for surgery
Ready patients for surgery, such as by washing and disinfecting incision sites
Help surgeons during surgery by passing them instruments and other sterile supplies
Count supplies, such as sponges and instruments
Maintain a sterile environment
Before an operation, surgical technologists setup the the room, equipment and sterilize everything. They also help the surgical team put on sterile gowns and gloves.
During an operation, surgical technologists pass supplies to the surgeons, hold organs in place, and take care of specimens going to the lab.
Once the operation is complete, surgical technologists may apply bandages and other dressings to the incision site.