Senior Information Security Architect

Guidehouse•Washington, DC

1d•Hybrid

About The Position

The Senior Security Architect will play a critical role supporting U.S. civilian agencies by designing, implementing, and governing secure enterprise and system architectures across mission, business, and shared services environments. This role focuses on enabling agency missions through secure digital modernization, cloud adoption, and risk‑based cybersecurity practices aligned with federal mandates. The Senior Security Architect partners closely with agency CIO, CISO, and system owners to translate policy, regulatory, and mission requirements into practical, compliant, and scalable security architectures. The Senior Security Architect designs and maintains enterprise and system‑level cybersecurity architectures aligned to federal standards and civilian agency guidance, including NIST, OMB, CISA, and Zero Trust directives. The role develops security architecture artifacts such as reference architectures, system security designs, control implementation guidance, and technical standards that support agency modernization initiatives. The Senior Security Architect supports cloud and hybrid environments, advising on secure architectures for identity and access management, data protection, network segmentation, logging, and endpoint security. The role leads and supports security engineering activities across the system development lifecycle, including requirements definition, architecture reviews, and integration of security controls into mission and business systems. The Senior Security Architect provides technical leadership for risk assessments, Security Assessments and Authorizations (ATO), continuous monitoring, and POA&M management efforts. The role collaborates with program managers, system owners, and compliance teams to align cybersecurity activities with program delivery, governance, and reporting requirements. The Senior Security Architect mentors junior staff and contributes to proposals, solution architectures, and thought leadership focused on civilian agency cybersecurity challenges.

Requirements

Minimum of TEN (10) years of experience in cybersecurity architecture, security engineering, or information security consulting, with demonstrated experience supporting U.S. civilian agencies or highly regulated environments.
Strong expertise in federal cybersecurity frameworks, including NIST Risk Management Framework and related guidance.
Active CISSP, PMP, and ITIL 4 certifications are required.
Must be able to OBTAIN and MAINTAIN a Federal or DoD "PUBLIC TRUST"; candidates must obtain approved adjudication of their PUBLIC TRUST prior to onboarding with Guidehouse.
Strong written and verbal communication skills, with the ability to work effectively with technical teams, program leadership, and non‑technical stakeholders.

Nice To Haves

Experience supporting civilian agency ATO programs, continuous monitoring, and compliance reporting is preferred.
Experience designing and implementing Zero Trust architectures in civilian agency environments.
Experience supporting cloud modernization initiatives and shared services platforms.
Prior experience working with OMB, CISA, or agency‑specific cybersecurity policies.
Candidates with an ACTIVE PUBLIC TRUST or SUITABILITY are preferred.

Responsibilities

Designs, implements, and governs secure enterprise and system architectures across mission, business, and shared services environments.
Enables agency missions through secure digital modernization, cloud adoption, and risk‑based cybersecurity practices aligned with federal mandates.
Partners closely with agency CIO, CISO, and system owners to translate policy, regulatory, and mission requirements into practical, compliant, and scalable security architectures.
Designs and maintains enterprise and system‑level cybersecurity architectures aligned to federal standards and civilian agency guidance, including NIST, OMB, CISA, and Zero Trust directives.
Develops security architecture artifacts such as reference architectures, system security designs, control implementation guidance, and technical standards that support agency modernization initiatives.
Supports cloud and hybrid environments, advising on secure architectures for identity and access management, data protection, network segmentation, logging, and endpoint security.
Leads and supports security engineering activities across the system development lifecycle, including requirements definition, architecture reviews, and integration of security controls into mission and business systems.
Provides technical leadership for risk assessments, Security Assessments and Authorizations (ATO), continuous monitoring, and POA&M management efforts.
Collaborates with program managers, system owners, and compliance teams to align cybersecurity activities with program delivery, governance, and reporting requirements.
Mentors junior staff and contributes to proposals, solution architectures, and thought leadership focused on civilian agency cybersecurity challenges.

Benefits

Medical, Rx, Dental & Vision Insurance
Personal and Family Sick Time & Company Paid Holidays
Position may be eligible for a discretionary variable incentive bonus
Parental Leave and Adoption Assistance
401(k) Retirement Plan
Basic Life & Supplemental Life
Health Savings Account, Dental/Vision & Dependent Care Flexible Spending Accounts
Short-Term & Long-Term Disability
Student Loan PayDown
Tuition Reimbursement, Personal Development & Learning Opportunities
Skills Development & Certifications
Employee Referral Program
Corporate Sponsored Events & Community Outreach
Emergency Back-Up Childcare Program
Mobility Stipend