Security Architect / Infrastructure Security Specialist - Contingent

Aretum•Washington, DC

5d•Hybrid

About The Position

Public Trust Eligibility Required This is a contingent position, meaning employment is dependent upon the successful award of the associated contract to Aretum and completion of any required background investigation or security clearance verification. 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 Security Architect / Infrastructure Security Specialist assesses enterprise IT environments and designs security architecture improvements for government systems. This role partners with infrastructure, network, and platform teams to evaluate current-state architecture, identify vulnerabilities and security gaps, and implement practical, standards-aligned controls across identity, network, endpoints, applications, and data. The work is grounded in risk-based control implementation and ongoing protection of organizational operations and assets. 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.

Requirements

Minimum 5 years of experience assessing enterprise IT environments (infrastructure, networks, platforms, and/or security engineering in complex environments)
Demonstrated experience in project management, network design, and testing the security of government systems to identify vulnerabilities
Working knowledge of security controls and how they map to enterprise implementations (identity, access control, configuration management, logging/monitoring, boundary protections, etc.)
Hands-on familiarity with vulnerability management practices and assessment techniques used to identify deviations and weaknesses in systems/networks
Strong technical writing skills and ability to produce clear architecture/security documentation and implementation guidance
Experience implementing or maturing zero trust-aligned security architecture (identity-centric controls, segmentation, continuous verification)
Experience applying systems security engineering concepts to ensure security is designed into systems across the lifecycle (not bolted on)
Experience in federal environments using NIST-aligned security/privacy control catalogs and baselines

Nice To Haves

Bachelor's degree in information systems, Computer Science, Engineering or related field
Preferred Certifications: GIAC Web Application Penetration Tester (GWAPT) Certified Ethical Hacker (CEH) GIAC Systems and Network Auditor (GSNA) Certified Penetration Tester (CPT) Certified Expert Penetration Tester (CEPT) GIAC Certified Web Application Defender (GWEB) Offensive Security Certified Professional (OSCP) CREST Penetration Testing Certifications

Responsibilities

Assess enterprise IT environments (on-prem, cloud, and hybrid) to identify security risks, architectural weaknesses, misconfigurations, and opportunities to improve defense-in-depth
Design and document security architectures and reference patterns (network segmentation, secure remote access, privileged access, boundary protections, logging/monitoring, and secure configuration baselines)
Work with network/infrastructure teams on secure network design and validation, including connectivity flows, trust boundaries, and segmentation approaches aligned to modern federal security architecture practices (e.g., zero trust concepts)
Lead or support security testing activities for government systems (vulnerability scanning coordination, configuration assessments, and validation testing) and translate results into clear remediation actions
Provide technical leadership and project management support for security improvement initiatives (planning, task tracking, coordinating dependencies, and delivery of architecture artifacts)
Ensure security designs and infrastructure changes align with applicable control requirements and are documented in an audit-ready manner consistent with federal control frameworks
Create and maintain architecture diagrams, security design documentation, implementation guidance, and standards for operational teams
Brief technical and non-technical stakeholders on architecture risk, tradeoffs, and prioritized remediation recommendations