Tengizchevroil is a leading company that produces oil, gas and associated products that fuels the modern economy. Our history is closely interlinked with the rise of an independent Kazakhstan.
TCO maintains a leading position in the field of industrial safety in terms of such standard indicators as lost working days incidents and the rate of reported incidents.

TCO continues to achieve industry-leading safety results in standard industrial safety measurements such as Serious Incidents and Total Recordable Incidents.
The Contractor Health, Environment and Safety Management Process establishes clear accountabilities, ensures active engagement of contractors, and provides a consistent CHESM program to eliminate health, safety and environment (HSE) incidents and injuries involving contractors.
The requirements and activities included in CHESM process are focused on defining TCO expectations regarding contractor HSE performance, the qualification of contractors and the monitoring of contractor performance against expectations.
Contractors involved in activities presenting risks to workforce and process safety are subject to CHESM Qualification to evaluate HSE Management Systems and ensure adequate safeguards are in place and functioning before starting work at TCO Facilities.
TCO's work is guided by two key principles: do it safely or not at all and there is always time to do it right. Every employee of TCO and its Business Partner companies is responsible for making sure that work can be safely started. Each person has the right to temporarily suspend or completely stop any work if unsafe behavior or conditions are observed. The TCO Safe Work Practices Management Group, together with other teams, ensure that Occupational Safety and Health (OSH) guidelines and procedures are continuously implemented and maintained.
On November 28, Tengizchevroil (TCO) hosted the 2025 Contractor Health, Environment, and Safety Management (CHESM) Forum for business partners. The company emphasized the importance of joint accountability, transparency, and the adoption of best practices to ensure every employee’s safety and support sustainable business growth.
TCO CHESM Process (Contractor Health, Environment, Safety Management) was implemented to enhance oversight and collaboration with Business Partner companies. The process aims to clearly define roles and responsibilities, ensure active engagement of Business Partners and provide a consistent CHESM program to help eliminate health, environment and safety incidents. Moreover, workplace inspections are carried out for existing Business Partners. The inspections verify compliance with occupational safety requirements under RoK Law and TCO’s internal regulations.
Stephen Conner, Operations General Manager, highlighted the vital role of partnership, integrity, and accountability in realizing TCO’s vision: The CHESM Process is critical to continuously monitoring safety at all TCO facilities where multiple contracting companies are working simultaneously. All risk data on the necessity of process improvement, manual updates and many other aspects are consolidated into a single database to track safety progress.

The forum encouraged everyone to demonstrate six operational discipline behaviors (OD6), fostering ownership, continuous improvement, and the sharing of best practices to strengthen safety and performance. During breakout sessions, leading partners shared innovative approaches, practical solutions, and lessons learned in managing these activities, reaffirming a shared commitment to safety and continuous improvement.
“TCO wants to work with Business Partners who understand they have joint accountability, are committed to having a strong safety culture, are empowered and focused on work planning to execution, and have strong visible leadership that tirelessly works at preventing serious injuries and fatalities,” emphasized Graeme Mackellar, OE/HSE Superintendent.

The 2025 CHESM Forum served as a platform to strengthen collaboration between TCO and its Business Partners by promoting a shared commitment to protecting people and the environment, fostering honesty, respect, and accountability in every operation. The event underscores that true partnership means embracing common values across companies, countries, and cultures, and provides an opportunity to demonstrate these principles in action through open dialogue and cooperation.
On November 28, Tengizchevroil (TCO) hosted the 2025 Contractor Health, Environment, and Safety Management (CHESM) Forum for business partners. The company emphasized the importance of joint accountability, transparency, and the adoption of best practices to ensure every employee’s safety and support sustainable business growth.
TCO CHESM Process (Contractor Health, Environment, Safety Management) was implemented to enhance oversight and collaboration with Business Partner companies. The process aims to clearly define roles and responsibilities, ensure active engagement of Business Partners and provide a consistent CHESM program to help eliminate health, environment and safety incidents. Moreover, workplace inspections are carried out for existing Business Partners. The inspections verify compliance with occupational safety requirements under RoK Law and TCO’s internal regulations.
Stephen Conner, Operations General Manager, highlighted the vital role of partnership, integrity, and accountability in realizing TCO’s vision: The CHESM Process is critical to continuously monitoring safety at all TCO facilities where multiple contracting companies are working simultaneously. All risk data on the necessity of process improvement, manual updates and many other aspects are consolidated into a single database to track safety progress.

The forum encouraged everyone to demonstrate six operational discipline behaviors (OD6), fostering ownership, continuous improvement, and the sharing of best practices to strengthen safety and performance. During breakout sessions, leading partners shared innovative approaches, practical solutions, and lessons learned in managing these activities, reaffirming a shared commitment to safety and continuous improvement.
“TCO wants to work with Business Partners who understand they have joint accountability, are committed to having a strong safety culture, are empowered and focused on work planning to execution, and have strong visible leadership that tirelessly works at preventing serious injuries and fatalities,” emphasized Graeme Mackellar, OE/HSE Superintendent.

The 2025 CHESM Forum served as a platform to strengthen collaboration between TCO and its Business Partners by promoting a shared commitment to protecting people and the environment, fostering honesty, respect, and accountability in every operation. The event underscores that true partnership means embracing common values across companies, countries, and cultures, and provides an opportunity to demonstrate these principles in action through open dialogue and cooperation.