Insider Threat & Security Operations Analyst II

Mastercard Colombia, Inc.; O’Fallon (MO); On-site; USD 76,000 - 127,000; Full time

Job summary

Mastercard is seeking a Corporate Security Operations Analyst II in O’Fallon, MO to monitor and investigate insider threats within a robust security operations function. You will analyze activity data from DLP, EDR, SIEM and UBA tools, lead investigations, and coordinate with Legal, Privacy and executive stakeholders to drive risk‑based decisions.

The role emphasizes independent investigations, cross‑functional liaison, and ongoing development of insider threat capabilities in a fast‑paced,

Qualifications

• Experience in security operations, incident response, insider risk, or related cybersecurity disciplines.

Responsibilities

• Work as an independent insider threat SME on complex, high-risk cases.
• Conduct technical analysis of user activity data and alerts.
• Maintain completeness and accuracy of the insider threat caseload.
• Analyze trends, risks, and metrics to support leadership decisions.
• Support enhancement of insider threat detection capabilities and countermeasures.
• Collaborate with Engineering, HR, Legal and Privacy teams on investigations.
• Mentor first-line analysts to embed insider threat processes.

Skills

Insider threat analysis

Incident response

SIEM analysis

Privacy liaison

OSINT

Tools

DLP

EDR

SIEM

Microsoft Purview

Microsoft Defender

Microsoft Sentinel

Endpoint DLP

Job description

Mastercard is seeking a Corporate Security Operations Analyst II in O’Fallon, MO to monitor and investigate insider threats within a robust security operations function. You will analyze activity data from DLP, EDR, SIEM and UBA tools, lead investigations, and coordinate with Legal, Privacy and executive stakeholders to drive risk‑based decisions.

The role emphasizes independent investigations, cross‑functional liaison, and ongoing development of insider threat capabilities in a fast‑paced,