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Senior Information System Security Officer; ISSO; Managing Consultant

Job in McLean, Fairfax County, Virginia, USA
Listing for: Guidehouse
Full Time position
Listed on 2026-01-02
Job specializations:
  • IT/Tech
    Cybersecurity, Information Security
Job Description & How to Apply Below
Position: Senior Information System Security Officer (ISSO) (Managing Consultant)

Job Family

Cyber Consulting

Travel Required

Up to 10%

Clearance Required

Active Secret

What You Will Do

Our Cybersecurity Consultants are a team of business integrators with extensive consulting and industry experience who help our clients solve their complex business issues from strategy through execution. A career in an integrated team of developers and consultants provides the opportunity to grow and contribute to our clients' business issues every day, applying a collection of security spectrum capabilities, including security strategy and governance, IT risk, security technologies, and cybercrime and breach response.

Guidehouse is currently seeking technical professionals in support of our Department of Defense client.

We are seeking an experienced Senior Information System Security Officer (ISSO) (Managing Consultant) with a proven track record to possess and apply comprehensive knowledge of information system security across key assignments, specifically for government clients. The ideal candidate will plan and lead major ISSO activities supporting Risk Management Framework (RMF) processes and collaborate with system owners and cybersecurity teams to progress through RMF steps.

The

ISSO

Will possess and apply comprehensive knowledge of information system security across key assignments. Plan and lead major ISSO activities supporting Risk Management Framework processes. Collaborate with system owners and cybersecurity teams to progress through RMF steps. Evaluate information system security posture and recommend major improvements. Function as technical expert on information system security across multiple projects. Support development of System Security Plans and assessment documentation.

Coordinate security control implementation and assessment activities. Maintain security documentation in approved repositories including eMASS.

Responsibilities
  • Develop security plans, generate assessment reports, and formulate remediation POA&Ms
  • Maintain security documentation in approved DoD repositories.
  • Coordinate security control implementation and assessment activities.
  • Support development of System Security Plans and assessment documentation.
  • Function as technical expert on information system security across multiple projects.
  • Evaluate information system security posture and recommend major improvements
What You Will Need
  • Bachelors Degree is required
  • Minimum of SEVEN (7) years of related experience in security controls assessments and applying the Risk Management Framework.
  • An ACTIVE and MAINTAINED “Secret” Federal or DOD security clearance.
  • Strong analytical and problem-solving skills.
  • Strong people skills managing a diverse set of stakeholders and direct client management experience.
  • Excellent verbal and written communication skills, with the ability to articulate technical issues and project goals to both technical and non-technical audiences.
  • Ability to identify obstacles and opportunities that impact the success of plans or initiatives.
  • Experience developing and maintaining trusted relationships with Federal clients onsite.
  • Experience managing direct client engagement team to deliver impactful support to Federal clients.
  • Demonstrated experience in developing security controls artifacts and evidence, including but not limited to:
    System Security Plans (SSPs), Risk Assessment Reports, and POA&Ms
What Would Be Nice To Have
  • At least one cyber certification:
    Security+, Certified Cloud Security Professional (CCSP) or AWS Certified Solutions Architect.
What We Offer

Guidehouse offers a comprehensive, total rewards package that includes competitive compensation and a flexible benefits package that reflects our commitment to creating a diverse and supportive workplace.

Benefits include:

  • 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 Pay Down
  • Tuition Reimbursement, Personal Development & Learning…
Position Requirements
10+ Years work experience
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