**Description** **More About the Role:** Join Our Mission to Secure the Network and Support the U.S. Navy in Enhancing Warfighter Capabilities with Advanced IT Solutions! The Digital Modernization Sector of Leidos has an exciting opportunity for a Senior Cyber Security Specialist to support the Service Management, Integration, and Transport (SMIT) contract, OCONUS Enterprise Network (ONE-Net) in Yokosuka, Japan. SMIT is the largest IT services program for the Navy, inclusive of cybersecurity services, network operations, service desk, and data transport. **What You'll Get to Do:** The Senior Cyber Security Specialist will play a key role in supporting efforts for the Service Management, Integration, and Transport (SMIT), OCONUS Enterprise Network (ONE-Net) contract located in Yokosuka, Japan. The candidate will provide leadership and expertise in the execution of Information Technology security management services providing a broad range of Information Assurance activities across the enterprise. •Implements and monitors security measures for communication systems, networks, and provides advice that systems and personnel adhere to established security standards and Governmental requirements for security on these systems. •Develops and executes Government approved security policies, plans, and procedures; implement data network security measures; operate and monitor network intrusion detection and forensic systems; conduct IS security incident handling; support Continuity of Operations Plan/Disaster Recovery (COOP/DR) plans and perform certification of IS and networks. •Performs other information security duties including operation of Electronic Key Management System (EKMS) and maintenance of Public Key Infrastructure (PKI). •Operates Trellix Endpoint Security System (ESS), firewalls, Intrusion Prevention Systems (IPS), Intrusion Detection Systems (IDS), other point of presence security tools, Virtual Private Networks (VPNs), and related security operations. •Performs defensive cyber operation duties including, but not limited to, ensuring workstation and server compliancy with Microsoft Defender Endpoint (MDE) and Trellix Endpoint Security System (ESS) requirements; identifying cybersecurity incidents using ESS, Tenable Security Center, RedSeal, Trellix Security Information and Event Manager (SIEM), and other automated tools; operating Imperva Web Application and Database firewalls; performing forensics and remedial action on cybersecurity incidents; and reporting defensive cyber operations statistics. •Confers with users to discuss issues such as computer data access needs, security violations, and programming changes. •Provide auditing support by executing audits, tracking findings, memorandums to completion and revising policies to support current capabilities. Support Command Cyber Readiness Inspection (CCRI) and Cyber Operational Readiness Assessment (CORA) and track open findings to completion. •Support the gathering, testing, and preparing artifacts for submission in Enterprise Mission Assurance Support Services (eMASS). It will be expected to provide support for Assessment & Authorization (A&A) by reviewing Fleet Readiness Certification Boards (FRCB), installation documents, and provide other input. •Work closely with the government client to develop, refine, and implement Information Assurance (IA) policies, ensuring robust cybersecurity measures and compliance with standards. **You'll Bring These Qualifications:** •Requires B.S. Degree and 4–8 years of prior relevant experience in the Information Technology field. •Must be a US Citizen and possess a DoD Secret Clearance. •DoD 8570 IAT III Certification (CASP +, CISSP). •Possess at least one OS/network certification (CCNA, CCNP, MDAA, MTA, MCP, MCTS, MCSA, MCSE, etc.). •Experience operating, maintaining and administrating network access control services. •Experience operating, maintaining and administrating endpoint security detection and response services and solutions. •Experience operating, maintaining and administrating host-based security detection and response services and solutions. **These Qualifications Would be Nice to Have:** •10 years’ experience across a broad-range of programs with increasing responsibility in overall information assurance and cybersecurity support for a broad range of program security solutions including security configuration and management services; data protection, anti-virus, malware detection and protection; host-based and endpoint security solutions; and audit and accountability services. •College degree (B.S.) in Information Technology, Information Assurance, Computer Science, Information Management Systems, or a related discipline. •ITIL v3 or v4 Foundation. NGEN **Original Posting Date:** 2025-02-26 While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. **Pay Range:** Pay Range $85,150.00 - $153,925.00 The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law. REQNUMBER: R-00154249 All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. Leidos will consider qualified applicants with criminal histories for employment in accordance with relevant Laws. Leidos is an equal opportunity employer/disability/vet.