Security Engineer & Operations - Senior

Active Top Secret Clearance Required

About Aretum

Aretum is a mission-driven organization committed to delivering innovative, technology-enabled solutions to our customers across defense, civilian, and homeland security sectors. Our teams work at the intersection of strategy, technology, and transformation, helping agencies solve their most critical challenges. We believe in investing in our people and creating a culture where collaboration, inclusion, and professional growth are at the forefront.

Job Summary

The Senior-Level Security Engineer & Operations professional provides advanced cybersecurity, compliance, and security engineering support to Department of War mission systems operating in complex, classified C5ISR and IIR environments. This role is responsible for technical leadership across Zero Trust implementation, SIEM/SOAR operations, traffic pattern analysis, incident response, and advanced risk assessment. The position serves as a senior technical authority and escalation point across enterprise, tactical, and mission networks.

Due to the nature of our work as a federal consulting organization, employees may be expected to handle Controlled Unclassified Information (CUI) and must adhere to applicable safeguarding and compliance requirements. 

Responsibilities

Zero Trust (ZT) Architecture & Implementation

• Support planning, assessment, and implementation of Zero Trust principles across classified environments
• Evaluate identity, device, network, application, and data protection controls
• Assess Zero Trust maturity against DoD Zero Trust reference architectures
• Provide recommendations to reduce implicit trust and strengthen access control enforcement

SIEM, SOAR & Traffic Pattern Analysis

• Oversee SIEM and SOAR operations for classified networks
• Analyze security logs, alerts, and correlated events to identify threats and anomalous behavior
• Perform traffic pattern analysis to detect lateral movement, unauthorized activity, and data exfiltration risks
• Support incident response investigations and forensic analysis

Advanced Vulnerability & Risk Analysis

• Oversee vulnerability management and advanced vulnerability analysis efforts
• Assess mission risk across enterprise, tactical, and mission networks
• Ensure the security posture of complex, interconnected classified systems
• Cloud Security: Configure and manage AWS Security toolsets (CloudTrail, GuardDuty, Inspector, Security Hub).

Leadership & Mentorship

• Provide technical leadership and guidance to engineering, operations, and compliance teams
• Mentor junior and mid-level cybersecurity personnel
• Support cybersecurity strategy development and continuous process improvement
• Stay current with emerging threats, adversary TTPs, and evolving DoD cybersecurity guidance