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Sr. Cyber Security Analyst (ISSO) with Security Clearance
TEKsystems c/o Allegis GroupReston, VA🇺🇸United StatesPosted 13 Jul 2026
Quick Overview
Work Type
Hybrid
Schedule
Temporary/Casual
Level
Mid Senior
Job Description
As a Sr. Cybersecurity Analyst III, your focus will be on Government System Authority to Operate (ATO) support. You will be responsible for guiding government clients through the intricate process of obtaining and maintaining ATO certifications for their information systems. You will leverage your expertise in government cybersecurity standards and regulations to monitor, analyze, and respond to potential security incidents and threats. Your role will ensure that our government clients' systems meet the stringent security requirements necessary for ATO compliance while aligning with government-specific cybersecurity guidelines. What you’ll do:
Collaborate with government clients to thoroughly understand their system architectures, security requirements, and objectives for achieving and maintaining ATO status within the context of government regulations.
Conduct exhaustive security assessments and risk analyses that cater to government system compliance, identifying vulnerabilities and potential threats specific to government systems.
Monitor security systems, logs, and network traffic with a keen focus on government cybersecurity guidelines, identifying any suspicious activity, intrusions, or unauthorized access attempts.
Collaborate closely with cross-functional teams to establish and maintain government-aligned security measures, including firewalls, intrusion detection systems, data encryption, and access controls.
Investigate and analyze security incidents to determine their cause, impact, and appropriate response.
Develop and implement incident response plans, including containment, eradication, and recovery strategies. What you’ll need to succeed:
10+ years of experience as a cybersecurity analyst with a specialization in Government System ATO support, demonstrating deep knowledge of government ATO principles, methodologies, and tools.
Strong experience in government regulatory frameworks, compliance requirements, and security standards specific to ATO (e.g., NIST SP 800-53, RMF, ICD 503, FISMA, FedRAMP)
Demonstrated and repeat experience achieving and maintaining ATO for cloud services and solutions from IL5 to IL6+ on NIPR, SIPR, and JWICS.
Understanding of network protocols, operating systems, and infrastructure components.
Strong proficiency in incident response, security incident handling, and forensic analysis techniques.
Expertise with government specific ATO assessment tools, vulnerability scanning tools, and intrusion detection/prevention systems.
Effective communication skills, with the ability to convey complex technical concepts to both technical and non-technical stakeholders.
CISSP or equivalent certification to support DoD 8140 requirements
Active TS//SCI clearance with CI poly Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: • Medical, dental & vision • Critical Illness, Accident, and Hospital • 401(k) Retirement Plan – Pre-tax and Roth post-tax contributions available • Life Insurance (Voluntary Life & AD&D for the employee and dependents) • Short and long-term disability • Health Spending Account (HSA) • Transportation benefits • Employee Assistance Program • Time Off/Leave (PTO, Vacation or Sick Leave) · This position requires an active DoD Clearance (Secret, Top Secret, Top Secret/SCI) or the ability to be obtain an (Interim Secret, Interim Top Secret)
· Because an active or interim DoD clearance is required, U.S. Citizenship is required
Collaborate with government clients to thoroughly understand their system architectures, security requirements, and objectives for achieving and maintaining ATO status within the context of government regulations.
Conduct exhaustive security assessments and risk analyses that cater to government system compliance, identifying vulnerabilities and potential threats specific to government systems.
Monitor security systems, logs, and network traffic with a keen focus on government cybersecurity guidelines, identifying any suspicious activity, intrusions, or unauthorized access attempts.
Collaborate closely with cross-functional teams to establish and maintain government-aligned security measures, including firewalls, intrusion detection systems, data encryption, and access controls.
Investigate and analyze security incidents to determine their cause, impact, and appropriate response.
Develop and implement incident response plans, including containment, eradication, and recovery strategies. What you’ll need to succeed:
10+ years of experience as a cybersecurity analyst with a specialization in Government System ATO support, demonstrating deep knowledge of government ATO principles, methodologies, and tools.
Strong experience in government regulatory frameworks, compliance requirements, and security standards specific to ATO (e.g., NIST SP 800-53, RMF, ICD 503, FISMA, FedRAMP)
Demonstrated and repeat experience achieving and maintaining ATO for cloud services and solutions from IL5 to IL6+ on NIPR, SIPR, and JWICS.
Understanding of network protocols, operating systems, and infrastructure components.
Strong proficiency in incident response, security incident handling, and forensic analysis techniques.
Expertise with government specific ATO assessment tools, vulnerability scanning tools, and intrusion detection/prevention systems.
Effective communication skills, with the ability to convey complex technical concepts to both technical and non-technical stakeholders.
CISSP or equivalent certification to support DoD 8140 requirements
Active TS//SCI clearance with CI poly Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: • Medical, dental & vision • Critical Illness, Accident, and Hospital • 401(k) Retirement Plan – Pre-tax and Roth post-tax contributions available • Life Insurance (Voluntary Life & AD&D for the employee and dependents) • Short and long-term disability • Health Spending Account (HSA) • Transportation benefits • Employee Assistance Program • Time Off/Leave (PTO, Vacation or Sick Leave) · This position requires an active DoD Clearance (Secret, Top Secret, Top Secret/SCI) or the ability to be obtain an (Interim Secret, Interim Top Secret)
· Because an active or interim DoD clearance is required, U.S. Citizenship is required
Skills
Encryption
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