Full-Time

Information System Security Officer

Updated on 5/9/2026

Redhorse

Redhorse

201-500 employees

Government consulting with AI-driven digital transformation

No salary listed

No H1B Sponsorship

Fort Belvoir, VA, USA

In Person

US Top Secret Clearance Required

Category
IT & Security (1)
Required Skills
Vulnerability Analysis
Requirements
  • PhD in an area of Science, Technology, Engineering or Mathematics with at least 15 years’ experience as a cybersecurity professional
  • Master's degree in an area of Science, Technology, Engineering or Mathematics with at least 18 years’ experience as a cybersecurity professional
  • Bachelor’s degree in an area of Science, Technology, Engineering or Mathematics with at least 20 years’ experience as a cybersecurity professional
  • Active TS security clearance and eligible for SCI and NATO read-on prior to starting work
  • Meet the DoD requirements for a privileged user on a TS/SCI information system prior to starting work - DoD 8140 / 8570.01-m requirements
  • 15+ years’ experience with the assessment and accreditation activities of national security systems (NSSs)
  • 10+ years’ experience validating system security controls
  • 10+ years’ experience with vulnerability management
  • 10+ years’ experience with DISA Security Technical Implementation Guides (STIGs), DISA Security Requirements Guide (SRG), and vendor-specific security guides
  • 8+ years’ experience with RMF and eMASS
  • 5+ years’ experience with POA&M tracking and resolution
  • 3+ years’ experience performing the continuous monitoring of system security controls
Responsibilities
  • Perform the duties of an Information System Security Officer (ISSO) as defined in AR 25-2, DA 25-2-14, and the NIST SP 800-53 security controls when the organizationally-defined personnel includes the ISSO
  • Actively manages the organization’s eMASS records which includes but is not limited to: Validates security controls including associated artifacts
  • Assesses security scan results and STIGs as required
  • Performs POA&M updates, tracking, and resolution
  • Leads the continuous monitoring activities of the organization
  • Manages the day-to-day activities and the professional development of the Cybersecurity Analysts
  • Collaborates with the O-ISSM on all assessment and authorization activities to ensure the information systems maintain an authority to operate (ATO) on all applicable DoD/IC networks
  • Maintain up-to-date status on all assigned systems and communicate status to the Government leads
  • Maintain complete records of communications, submit written status reports as required, perform peer-review as directed, and attend weekly meetings
  • Correspond with the Government customer and system administrators to communicate any unacceptable risks identified and correct deficient POA&M items to meet DoD and IC standards
  • Coordinate with the Security Control Assessor (SCA) to perform analysis of the overall risk level the system poses to enterprise networks and to mission data
  • Create and maintain cybersecurity policies and standards
  • Ensure that cybersecurity plans, controls, processes, standards, policies, and procedures are aligned with cybersecurity standards
  • Ensures security scans and STIG checklists are updated according to DA G2 policy
  • Produces actionable, risk-based reports on security assessment results
  • Assists with vulnerability remediation when necessary
  • Develops and maintains security plans and security testing plans
  • Periodically updates and improves risk models; metrics; reports; processes; and activities to stay compliant with evolving DoD and IC standards
  • Ensures the user community understands and adheres to necessary procedures to maintain security posture of the information systems
  • Provides guidance in the creation and maintenance of Standard Operating Procedures (SOPs); Tactics, Techniques, and Procedures (TTPs); and other similar documentation
Desired Qualifications
  • 10 years’ experience as an ISSO on Army Intel programs
  • 2 years’ experience with AC2SP tenant assessment and accreditation activities

Redhorse helps government agencies improve operations using data and technology, applying digital transformation and AI across National Security, Networking Technology and Infrastructure, Energy, and the Environment. Its offerings are advisory and implementation services, delivered through project-based engagements and long-term partnerships rather than physical products. The company differentiates itself through close collaboration with clients, deep sector expertise, and a focus on mission-critical outcomes that require security and regulatory compliance. The goal is to enable safer, more efficient, and data-driven government operations.

Company Size

201-500

Company Stage

Growth Equity (Venture Capital)

Total Funding

N/A

Headquarters

San Diego, California

Founded

2008

Simplify Jobs

Simplify's Take

What believers are saying

  • GSA Schedule 07F134GA enables streamlined federal IT procurement.
  • Blue Delta Capital Partners investment in 2024 fuels growth.
  • Noah Klemm promoted to president, overseeing strategic operations.

What critics are saying

  • Rapid M&A integrations fail, diluting consulting capabilities in 6-12 months.
  • John Zangardi's CEO retirement disrupts client relationships in 12-18 months.
  • Government contract losses devastate revenue lacking diversification in 18-36 months.

What makes Redhorse unique

  • Redhorse integrates AI/ML with consulting for national security solutions.
  • Acquired Mannakee Group in March 2025 for DevSecOps expertise.
  • Acquired Allied Associates International to expand cybersecurity intelligence.

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Benefits

Health Insurance

Dental Insurance

Vision Insurance

Health Savings Account/Flexible Spending Account

Life Insurance

Disability Insurance

401(k) Retirement Plan

Remote Work Options

Company News

CityBiz
Mar 18th, 2025
Redhorse Acquires Mannakee Group for Innovation

Redhorse Corporation has acquired The Mannakee Group to enhance its capabilities in providing innovative solutions for federal defense and national security. The Mannakee Group, based in Kensington, Maryland, is known for its advanced software development and DevSecOps practices. This acquisition will combine Mannakee's expertise with Redhorse's AI/ML capabilities to deliver cutting-edge technology solutions. Mannakee's leadership will continue to drive growth within Redhorse's National Security portfolio.

CityBiz
Mar 18th, 2025
Redhorse Corporation Acquires The Mannakee Group

WASHINGTON, D.C., March 18, 2025 - Redhorse Corporation today announced the strategic acquisition of The Mannakee Group, enhancing its position as a premier provider of innovative solutions for the federal defense and national security communities.

GovCon Wire
Dec 3rd, 2024
John Zangardi to Retire as Redhorse CEO, Noah Klemm Appointed President

In a related development, Redhorse announced the promotion of Noah Klemm from chief delivery officer to president, effective immediately.

GovCon Wire
Feb 13th, 2024
Michael Rauseo, Lance Orr Take on VP Roles Within Redhorse National Security Practice

Redhorse has expanded the leadership team within its national security practice with the appointment of Michael Rauseo as vice president of national security growth and Lance Orr as VP of national security operations.

GovCon Wire
Nov 20th, 2023
Matthew Dost Named Redhorse General Counsel, VP of Compliance

Matthew Dost, formerly general counsel and director of contracts at Allied Associates International, has been named general counsel and vice president of compliance at Redhorse.