Senior Security Engineer - Data Protection & Insider Threat

Constellis • Herndon, VA

2d

About The Position

Constellis is seeking a skilled Sr. Security Engineer to lead initiatives in data protection, classification, and insider threat detection. This role will focus on securing enterprise data through advanced controls, supporting eDiscovery and DLP operations, and investigating potential misuse or leakage of sensitive information.

Requirements

• Bachelor's degree preferred. Five additional years of related experience beyond the minimum may be substituted in lieu of a degree.
• 5+ years of experience in data security, DLP, or insider threat investigations.
• Hands-on experience with tools like Microsoft Purview, eDiscovery, and classification tools.
• Experience with SIEM, UEBA, and forensic investigation tools.
• Excellent analytical, communication, and documentation skills.
• Ability to obtain and maintain at least a Top Secret clearance.

Responsibilities

• Design and implement data classification frameworks aligned with regulatory and contractual requirements (e.g., CMMC, CUI, DFAR, GDPR, ITAR).
• Manage and optimize Data Loss Prevention (DLP) policies across endpoints, on-premises, cloud services, and email platforms.
• Support eDiscovery workflows, including review set management, legal hold coordination, and audit trail integrity.
• Conduct insider threat investigations using behavioral analytics, audit logs, and forensic tools.
• Collaborate with Legal, HR, and Compliance teams to ensure ethical and lawful handling of sensitive data.
• Maintain and enhance data protection and data governance platforms.
• Develop and document security controls, workflows, and incident response playbooks related to data misuse.
• Monitor regulatory developments and update controls to maintain compliance.
• Actively search all areas of the internal network for hidden threats and vulnerabilities
• Support audits and compliance efforts
• Participate in red/blue/purple team exercises as needed to analyze threat scenarios and assess internal defenses and document results.
• Engage positively across multiple teams to establish clarity, vision, and mutual trust in order to achieve business goals
• Adheres to industry-specific local, state, and federal regulations, as applicable
• Other duties as assignedOther duties as assigned

Benefits

• Medical, Vision & Dental Insurance
• Paid Time-Off Program & Company Paid Holidays
• 401(k) Retirement Plan
• Insurance: Basic Life & Supplemental Life
• Health & Dependent Care Flexible Spending Accounts
• Short-Term & Long-Term Disability
• Personal Development & Learning Opportunities
• On-the-job Training, Skills Development & Certifications
• Corporate Sponsored Events & Community Outreach

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Number of Employees: 5,001-10,000 employees