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Information System Security Engineer (ISSE)

The Greentree Group
The Greentree Group Salary
Colorado, CO Full Time
POSTED ON 9/25/2025
AVAILABLE BEFORE 10/24/2025
About The Company

The Greentree Group is a professional services business comprised of talented analysts and problem-solvers who work with clients around the world on programs ranging from start-up business process consulting situations to planning the modernization of major information technology systems. Our people are key in developing and executing strategic and tactical plans and share in the challenges and rewards of working for a small company. Our team of experts can tackle the toughest problem and solve it right—the first time! What makes The Greentree Group successful is our outstanding people who hold a spotless record of customer satisfaction. We’re focused on doing business better—to better our client’s business!

About The Opportunity

The Greentree Group employees are truly valued and treated with respect. We need a talented individual to fill a potential role as an Information System Engineer (ISSE) in support of a federal client in the Colorado Springs, CO area. The successful candidate will be responsible for several activities, including, but not limited to:

  • Providing cybersecurity advice and guidance to government stakeholders and contract team
  • Supporting Assessment and Authorization (A&A) and Authority to Operate (ATO) cybersecurity reviews, identify gaps, and support and execute risk management plans
  • Implementing robust security controls with software engineering methodologies, principles, secure design, architecture, and coding techniques
  • Assessing system vulnerabilities and developing and maintaining security tools such as firewalls, intrusion detections systems, and encryption technologies to mitigate risks
  • Conducting security and penetration tests to identify weaknesses in security protocols
  • Advising system engineers on methods to remediate vulnerabilities using security scanning tools

Minimum Qualifications

  • Bachelor’s degree in a related field (or 5 years’ experience).
  • Familiarity with DoDI 5000.02 (Operation of the Adaptive Acquisition Framework) and NIST SP 800-1602v1 (System Security Engineering)
  • Active DoD 8140 IAM Level III certification (CISM, CISSO, FITSP-D, GCIA, GCSA, GCLD, GDSA, GICSP, CISSP-ISSAP, or CISSP-ISSEP)
  • Strong customer service, interpersonal, and communication skills (written and verbal)
  • Good organizational, time management, analytical, and problem-solving skills
  • Candidates must be U.S. Citizens and have the ability to obtain a secret clearance investigation in a timely manner

Desired Qualifications

  • Experience with batch scripting
  • Experience with Cloud security planning, design, and operations

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