Criminal investigators examine and process the scenes of crimes and the evidence found in them. They handle and protect the evidence compliant with rules and regulations, and isolate the scene from outside influence. They photograph the scene, ensure the maintenance of the evidence, and write reports.

Criminal justice social workers tackle criminal behaviour and reduce risk of reoffending by promoting and establishing programs to prevent crime within communities. They assist in prosecutions and help to investigate criminal cases. They assist prisoners reinsert into the community after release from custody. They also support and supervise the offenders sentenced to community service and provide support to the victims and the people closely affected by the crime.

Criminologists study conditions pertaining to humans such as the social and psychological aspects that could lead them to commit criminal acts. They observe and analyse different factors ranging from behavioural conditions up to social background and environment of suspects in order to advise organisations on the prevention of crime.

Crisis helpline operators provide advice and support to distraught callers via the telephone. They have to deal with a diverse range of issues such as abuse, depression and financial problems. Helpline operators maintain records of the phone calls according to regulations and privacy policies.

Crisis situation social workers provide emergency support and assistance to persons with physical or mental disorders by addressing their distress, impairment, and instability. They assess the level of risk, mobilise client resources, and stabilise the crisis.

Critics write reviews of literary, musical and artistic works, restaurants, movies, television programs and other themes for newspapers, journals, magazines, radio, television and other media. They evaluate theme, expression and technique. Critics make judgements based on their personal experience and knowledge.

Crop production managers plan the production, manage the enterprise and participate in the production process of crop production facilities.

Crop production workers carry out practical activities and assist in the production of agronomical crops.

Crosscut saw operators use a manual crosscut saw. Crosscut sawing is used for 'felling' and 'bucking' trees, or taking off the limbs to obtain logs. Crosscut sawyers may also work with smaller crosscut saws in a workshop to make manual cuts.

Crossing guards direct pedestrians in public places like streets nearby schools or railways to cross public roads and intersections by observing traffic and holding a stop sign towards the vehicles to allow the crossing of pedestrians in a safe and orderly manner.

Crowd controllers keep constant watch of the crowd during a specific event such as public speeches, sporting events or concerts, in order to prevent and react quickly to incidents. They control the entry to the venue, monitor the behaviour of the crowd, handle aggressive behaviour and conduct emergency evacuations.

Cultural centre directors manage operations of a cultural community centre, they organise and promote cultural activities and events, manage staff, and aim to promote the overall inclusion of cultural programmes in the community.

Cultural facilities managers direct the operations of facilities that provide cultural services such as theatre, movies and music. They plan and organise the daily operations of the related staff and facilities and ensure the organisation follows the latest developments in its field. They coordinate the different departments of the facility and manage the correct use of resources, policies and budgets.

Cultural policy officers develop and implement policies to improve and promote cultural activities and events. They manage resources and communicate with the public and media in order to facilitate interest in cultural programs and emphasize their importance in a community.

Curators of horticulture develop and maintain the botanical collections, exhibits and landscapes of a botanical garden.

Curing room workers assist in the blending, aging, and fermenting of tobacco strips and stems for the production of cigars, chewing tobacco and snuff.

Curriculum administrators develop and improve the curricula of education institutions. They analyse the quality of existing curricula and work towards improvement. They communicate with education professionals to ensure an accurate analysis. They report on curriculum developments and perform administrative duties.

Customer contact centre information clerks provide information to customers via the telephone and other media such as email. They answer inquiries about a company's or oganisation's services, products and policies.

Customer experience managers monitor customer experiences by creating, evaluating and improving the customer's interaction organisations in the hospitality, recreation or entertainment industry. They develop plans of action to optimise all aspects of the customer's experience. Customer experience managers strive to ensure customer satisfaction and boost company profits.

Customer service representatives handle complaints and are responsible for maintaining overall goodwill between an organisation and its customers. They manage data regarding customer satisfaction and report it.

Customs and excise officers approve or deny the passage of goods through customs barriers for international business and ensure compliance with consignment legislation. They facilitate communication between import and export trading institutions and government officials, and are responsible for taxation calculation and ensuring payment.

Customs officers combat the importation of illegal goods, firearms, drugs or other dangerous or illegal items while checking the legality of items brought across national borders. They are government officials who control the documents to ensure entry criteria and custom laws are complied with and control if the custom taxes are paid correctly.