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Check-6 is the global performance improvement consultancy. Since 2007, we have been committed to becoming the world’s number one choice for HRO environments. We now partner with companies across multiple industries worldwide striving to achieve improved performance and operational efficiency. The core service we provide is that of a performance consultancy with multifaceted solutions tailored to your business requirements. Our Solutions: Performance Improvement Consulting Performance Excellence™ is our proven methodology, tailored to client objectives, in order to reduce human error and a sustain a culture of continuous improvement. Using a “Plan Based Execution” model, our coaches work hand in hand with your teams providing training and mentoring to sustain improvements in operational efficiency and safety. RIGOR® Digital Checklist System (DCS) RIGOR® is our proprietary digital checklist system that allows you to capture and formalize mandatory best-practices that result in verifiable compliance and increased reliability in standard work and procedures across your business. The system provides operational analytical feedback with evidenced measurement against baseline performance and acts as a valuable resource tool in sustaining procedural and cultural improvement. Well Control Virtual Instructor (WCVI) WCVI is a portable system that simulates primary and secondary well control scenarios in accordance with recommended standards of the International Well Control Forum (IWCF) and International Association of Oil and Gas Producers (IOGP). WCVI provides the ability to train continuously during normal hitch rotations using simulated well control fundamentals. Dropped Object Prevention Services Solutions to assist with the identification, mitigation and elimination of potential dropped objects to include: DROPS Site Inspections • DROPS Audits • DROPS Awareness and Working at Heights Training Courses • DROPS Program Creation/Implementation • Light Repair Work

Check-6 Questions

The Check-6 annual revenue was $84.5 million in 2026.

Yarko Sos is the Founder and Director of Check-6.

64 people are employed at Check-6.

Check-6 is based in Tulsa, Oklahoma.

The NAICS codes for Check-6 are [213112, 21, 21311, 541, 2131, 213, 54].

The SIC codes for Check-6 are [874, 87].

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