Lighting designers develop a lighting design concept for a performance and supervise the execution of it. Their work is based on research and artistic vision. Their design is influenced by and influences other designs and must be conform with these designs and the overall artistic vision. Therefore, the designers work closely with artistic directors, operators and the artistic team. During rehearsals and performance they coach the operators to obtain optimal timing and manipulation. Lighting designers develop lighting plots, cue lists and other documentation to support the operators and production crew. Lighting designers sometimes also work as autonomous artists, creating light art outside a performance context.

Lighting directors determine what lights are needed during production, according to the video and motion picture director's creative vision. They use the script to design the lighting requirements for each shot. Lighting directors oversee the lighting setup and operation.

Lighting technicians setup, prepare, check and maintain equipment in order to provide optimal lighting quality for live performances and motion pictures. They cooperate with road crew to unload, set up and operate lighting equipment and instruments.

Lime kiln operators control equipment that burns limestone to produce lime or carbon dioxide. They control the flow of the materials, fuel, and air and observe the material flow, air, temperature, fuel charts, and oxygen gauges and make adjustments if necessary. They also keep production records.

Linen room attendants retrieve linen or uniforms for cleaning. They maintain service availability of the linen and keep inventory records.

Linguists study languages scientifically. They master languages and can interpret them in terms of their grammatical, semantic, and phonetic characteristics. They research the evolution of language and the way it is used by societies.

Linguistics lecturers are subject professors, teachers, or lecturers who instruct students who have obtained an upper secondary education diploma in their own specialised field of study, linguistics, which is predominantly academic in nature. They work with their university research assistants and university teaching assistants for the preparation of lectures and of exams, for grading papers and exams and for leading review and feedback sessions for the students. They also conduct academic research in their respective field of linguistics, publish their findings and liaise with other university colleagues.

Liquid fuel engineers evaluate liquid fuel extraction sites. They design and develop methods for extracting liquid fuels from underneath the earth’s surface, these fuels include petroleums, natural gas, liquefied petroleum gas, non-petroleum fossil fuels, biodiesel and alcohols. They maximise the recovery of hydrocarbon at a minimum cost, pursuing minimal impact on the environment.

Liquid waste treatment technicians remove hazardous chemicals and pollutants from liquid waste such as oil so that it can be safely used for new applications. They operate and maintain liquid waste treatment equipment, monitor operations, and test samples to ensure the safety standards are met.

Liquor blenders regauge, filter, rectify, blend and verify proof of alcoholic drinks before these are prepared for bottling. For the purpose, they tend equipment and machinery to perform each one of these processes.

Liquor grinding mill operators run mills that grind cracked cocoa beans or nibs of cocoa bean paste as to obtain liquid chocolate of specified consistency. They operate hoppers by sliding their gates to release cocoa nibs which then go through grinding stones.

Literary scholars research works of literature, history of literature, genres, and literary criticism in order to appraise the works and the surrounding aspects in an appropriate context and to produce research results on specific topics in the field of literature.

Literature teachers at secondary schools provide education to students, commonly children and young adults, in a secondary school setting. They are usually subject teachers, specialised and instructing in their own field of study, literature. They prepare lesson plans and materials, monitor the students’ progress, assist individually when necessary, and evaluate the students’ knowledge and performance on the subject of literature through assignments, tests and examinations.

Lithographers make and prepare metal plates to be used as the original in various printing processes and media. Plates are usually laser-etched from digital sources with computer-to-plate technology, but can also be made by applying types of emulsions to the printing plate.

Live animals distribution managers plan the distribution of live animals to various points of sales.

Live animal transporters provide transport and transfer for live animals, including the monitoring of the health and welfare of animals, the planning of, and preparation for journeys, loading and unloading of animals, according to national and international legislation.

Live chat operators respond to answers and requests posed by customers of all nature through online platforms in websites and online assistance services in real time. They are available to provide service through chat platforms and have the ability to solve inquiries of clients via written communication merely.

Livestock advisors provide complex specialist advice to farmers and livestock breeders to ensure that their business and production is optimised.

Livestock workers maintain the health and welfare of animals. They oversee the breeding/production and day-to-day care such as feeding and watering of animals.

Loan officers assess and authorise the approval of loan applications for individuals and businesses. They ensure complete transactions between loan organisations, borrowers, and sellers. Loan officers are specialists in consumer, mortgage, or commercial lending.

Localisers translate and adapt texts to the language and culture of a specific target audience. They convert standard translation into locally understandable texts with flairs of the culture, sayings, and other nuances that make the translation richer and more meaningful for a cultural target group than it was before.

Location managers are responsible for procuring locations for filming outside of the studio and all the logistics this includes. They negotiate site use, and manage and maintain the site during shooting. Location managers manage the safety and security of the film crew on site.