Occupational Disease Investigator

Occupational disease investigators work for the Health and Safety Executive (HSE) within its specialist inspector cadre, investigating cases of work-related ill health — occupational asthma, hand-arm vibration syndrome (HAVS), occupational dermatitis, musculoskeletal disorders, work-related stress, and occupational cancers including mesothelioma from asbestos exposure. The role operates under the Health and Safety at Work etc. Act 1974, the Management of Health and Safety at Work Regulations 1999, and disease-specific regulations (COSHH, VIBRATION, Manual Handling).

Investigation work begins with case referral — from GPs, occupational physicians, hospital consultants, insurers, or employees. Investigators assess whether the illness is causally related to work, gather medical evidence, inspect the workplace to assess exposure levels (using occupational hygiene measurements), and determine whether there has been a breach of health and safety law. Investigation findings can lead to enforcement action — Improvement Notices, Prohibition Notices, or prosecution — or to advisory intervention where a breach has not occurred but risk is present.

Occupational hygiene assessment is a core technical skill: investigators assess workplace environments for exposure to hazardous substances (dusts, fumes, solvents, biological agents), noise, vibration, and ergonomic risk factors. They commission and interpret specialist occupational hygiene monitoring reports and liaise with HSE's occupational physicians and toxicologists on causation questions in complex cases. Investigation reports contribute to HSE intelligence on disease prevalence and causation, informing national occupational health strategy.

Enforcement and prosecution casework involves preparing investigation files for formal legal proceedings, giving evidence in criminal court and at Fatal Accident Inquiries, and engaging with RIDDOR reports (under the Reporting of Injuries, Diseases and Dangerous Occurrences Regulations 2013) for notifiable occupational diseases.

HSE occupational disease investigation is a statutory regulatory function — the HSE is the national regulatory authority for health and safety in Great Britain, and occupational disease prevention is a legal duty of employers under the Health and Safety at Work Act. Occupational ill health costs the UK economy approximately £9.9 billion annually (HSE statistics), and political pressure to reduce this burden sustains HSE's occupational health regulatory programme.

The specialist technical nature of occupational disease investigation — occupational hygiene, occupational medicine, exposure assessment, and legal enforcement — creates a genuine professional specialism that cannot be commoditised or automated. HSE specialist inspectors have powers of entry, investigation, and enforcement that are legally constituted under primary legislation and cannot be replicated by private sector consultants. Emerging disease burdens — Long COVID as an occupational disease, climate-related heat stress at work, and digital work-related health risks — are extending the scope of occupational disease investigation.

Morning: reviewing a cluster referral of three HAVS cases from a GP practice in an engineering district — all three patients are or were employed at the same metalworking firm. You carry out a desktop review of the employer's RIDDOR history and COSHH assessments, then contact the employer to arrange a site visit under Health and Safety at Work Act Section 20 powers. Afternoon: site inspection at the engineering firm — carrying out a walkthrough assessment of vibrating tool use, reviewing whether Tool Vibration Risk Assessments comply with the Control of Vibration at Work Regulations 2005, checking health surveillance records and HAV exposure point calculations. You identify a systemic failure in health surveillance and begin drafting an Improvement Notice. Late afternoon: completing the investigation file for a mesothelioma case being referred to the Crown Prosecution Service.