Oil Refiner HF Sinclair Fires Chief Financial Officer Following Internal Review

Oil refining company HF Sinclair announced Wednesday that it has fired Chief Financial Officer Atanas Atanasov, who had been away from work since late February while the company’s audit committee investigated internal concerns.

This announcement follows Tuesday’s news that Chief Executive Officer Timothy Go left the company through a separation agreement after taking voluntary leave for almost three months.

The company launched an internal review in January to examine company procedures after Atanasov expressed worries about Go’s conduct and how it affected the company’s leadership culture for 2025 reporting requirements.

During the later phases of this review, additional issues emerged regarding Atanasov’s conduct and whether he could maintain effective working relationships with other management personnel.

HF Sinclair stated that Chief Accounting Officer Vivek Garg will remain in his position as interim CFO, a responsibility he has maintained since February.