Senior Information Systems Security Engineer – Technical Lead

Guidehouse

Senior Information Systems Security Engineer leading secure system architecture for federal initiatives. Focused on cybersecurity engineering across cloud, hybrid, and on-prem environments.

Posted 5/12/2026full-timeArlington • Virginia, Washington • 🇺🇸 United StatesSenior💰 $113,000 - $188,000 per yearWebsite

Tech Stack

Tools & technologies

AWSAzureCloudCyber SecurityGoogle Cloud PlatformSplunk

About the role

Key responsibilities & impact

Lead the development, engineering, and review of secure system architectures across cloud, hybrid, and on‑prem environments.
Implement and validate NIST 800‑53 security controls and cloud‑native security services (IAM, encryption, segmentation, logging).
Lead threat modeling, risk assessments, and advanced system security engineering reviews.
Oversee secure configuration management, including STIG‑based hardening, SCAP assessments, and enforcement of security baselines.
Evaluate and recommend security technologies, tools, and design patterns to support mission needs and modernization efforts.
Provide engineering leadership during RMF activities, including boundary definition, control inheritance, system architecture documentation, and ATO engineering support.
Lead or support security functional testing, integration testing, and validation of implemented controls.
Guide cross‑functional development, engineering, DevSecOps, and operations teams on secure integration practices.
Mentor junior and mid‑level ISSEs and act as a technical escalation point for cloud engineering issues.

Requirements

What you’ll need

Bachelor’s degree in Cybersecurity, Information Systems, Computer Engineering, or related technical field.
Minimum of EIGHT (8) years of cybersecurity or secure systems engineering experience, including cloud architecture.
An ACTIVE and CURRENT TOP SECRET federal or DOD security clearance.
Strong understanding of security frameworks and compliance standards (e.g., NIST, RMF SP 800-53 Rev 5, DoD 8570).
Proven experience in designing and implementing enterprise security tools such as SIEM (e.g., Splunk), vulnerability scanners (e.g., Nessus), and endpoint protection platforms (e.g., Crowdstrike).
Experience with cloud security practices and technologies (AWS, Azure, GCP).
Demonstrated ability to lead cross-functional teams and complex technical projects.
Strong analytical and problem-solving skills.
Excellent communication skills with the ability to convey technical concepts to non-technical stakeholders.

Benefits

Comp & perks

Medical, Rx, Dental & Vision Insurance
Personal and Family Sick Time & Company Paid Holidays
Parental Leave
401(k) Retirement Plan
Group Term Life and Travel Assistance
Voluntary Life and AD&D Insurance
Health Savings Account, Health Care & Dependent Care Flexible Spending Accounts
Transit and Parking Commuter Benefits
Short-Term & Long-Term Disability
Tuition Reimbursement, Personal Development, Certifications & Learning Opportunities
Employee Referral Program
Corporate Sponsored Events & Community Outreach
Care.com annual membership
Employee Assistance Program
Supplemental Benefits via Corestream (Critical Care, Hospital Indemnity, Accident Insurance, Legal Assistance and ID theft protection, etc.)

ATS Keywords

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Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

secure system architectureNIST 800-53cloud securityrisk assessmentssecure configuration managementSTIG hardeningSCAP assessmentssecurity functional testingDevSecOpsenterprise security tools

Soft Skills

leadershipmentoringanalytical skillsproblem-solving skillscommunication skillscross-functional team leadership

Certifications

TOP SECRET security clearance