Broadcast engineering is the field of electrical engineering, and now to some extent computer engineering, which deals with radio and television broadcasting. Audio engineering and RF engineering are also essential parts of broadcast engineering, being their own subsets of electrical engineering.
Broadcast engineering involves both the studio end and the transmitter end (the entire airchain), as well as remote broadcasts. Every station has a broadcast engineer, though one may now serve an entire station group in a city, or be a contract engineer who essentially freelances his services to several stations (often in small media markets) as needed.

Modern duties of a broadcast engineer include maintaining broadcast automation systems for the studio and automatic transmission systems for the transmitter plant. There are also important duties regarding radio towers, which must be maintained with proper lighting and painting. Occasionally a station's engineer must deal with complaints of RF interference, particularly after a station has made changes to its transmission facilities.
Broadcast engineers are generally required to have knowledge in the following areas, from conventional video broadcast systems to modern Information Technolgy:
Video – Standard / High Definition.
Video compression - DV25, MPEG, DVB or ATSC.
Television studios - Broadcast Cameras and lenses.
Vision Mixers or Production switchers.
Digital server playout technologies.
Broadcast automation
Disk storage – RAID / NAS / SAN technologies.
Archives – Tape archives or grid storage technologies.
Networking.
Operating systems – Windows / Linux.
Post production – Capture and Non-linear editing.
RF satellite uplinking – High powered Amplifiers.
RF satellite downlinking – Band detection, carrier detection and IRD tuning etc.
Health and safety.
Above mentioned requirements vary from station to station.