Information System Security Manager (ISSM) LeidosInformation System Security Manager (ISSM)Lorton, VirginiaFacilitate approval process for Authorization to Operate (ATO), Authority to Extend (ATE), Authorization to Connect (ATC), and Interconnection Security Agreements (ISA), working with the customer and stakeholders to submit body of evidence artifacts and receive SCA/AO endorsement. August 11, 2026 For U.S. Positions: 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.
Data Center Physical Security Systems Engineer OpenAI LLCData Center Physical Security Systems EngineerDCFor unincorporated Los Angeles County workers: we reasonably believe that criminal history may have a direct, adverse and negative relationship with the following job duties, potentially resulting in the withdrawal of a conditional offer of employment: protect computer hardware entrusted to you from theft, loss or damage; return all computer hardware in your possession (including the data contained therein) upon termination of employment or end of assignment; and maintain the confidentiality of proprietary, confidential, and non-public information. As OpenAI's global compute footprint continues to expand, this role will partner closely with infrastructure engineering, hardware operations, networking, and regional operations teams to design and deploy scalable security architectures across a diverse portfolio of data center environments.
Information System Security Engineer MarkonInformation System Security EngineerChantilly, Virginia$150,000–$180,000 / yearFull timeDevelop and maintain cybersecurity documentation supporting RMF and Assessment & Authorization (A&A) activities, including System Security Plans (SSPs), Security Assessment Reports (SARs), Plans of Action and Milestones (POA&Ms), risk assessments, and related artifacts. Our growing reach extends across 17 states, 116 countries, and 5 continents, where our team of dynamic professionals collaborates to deliver unparalleled program and project management services.
Senior Vulnerability Engineer AnaVationSenior Vulnerability EngineerReston, VAAs our Senior Vulnerability Engineer, you will provide Subject Matter Expertise support to maintain Vulnerability Management Program requirements including, but not limited to, maintaining the patch repository, issuing alerts and bulletins, and tracking compliance. We deliver groundbreaking research with advanced software and systems engineering that provides an information advantage to contribute to the mission and operational success of our customers.
Senior Software Engineer, Federal Platform Peregrine TechnologiesSenior Software Engineer, Federal PlatformWashington, DC$200,000–$250,000 / yearRepresentative problems you'll work on include: standing up new regions and customer environments with minimal manual work as Peregrine's footprint grows; building and shipping autoscaling and right-sizing systems that cut cloud spend without sacrificing headroom; strengthening reliability and incident response for mission-critical services so outages are rare and fast to resolve; hardening platform security controls to meet the compliance bar our public-sector customers require; and building paved-road tooling that lets product teams deploy, observe, and debug their services without needing deep infra expertise. Backed by leading Silicon Valley investors, Peregrine helps public safety organizations, state and local and governments, federal agencies, and private-sector institutions address society’s challenges with unprecedented speed and accuracy.
Information System Security Engineer (ISSE) PeratonInformation System Security Engineer (ISSE)Annapolis Junction, Maryland$146,000–$234,000 / yearFull timeImplements security systems by specifying intrusion detection methodologies and equipment; directing equipment and software installation and calibration; preparing preventive and reactive measures; creating, transmitting, and maintaining keys; providing technical support; completing documentation. Experience administrating, configuring, and troubleshooting core modules such as Enterprise Password Vault (EPV), Password Vault Web Access (PVWA), Central Policy Manager (CPM), and Privileged Session Manager (PSM) in CyberArk.
NewInformation System Security Engineer Markon SolutionsInformation System Security EngineerChantilly, VA$150,000–$180,000 / yearDevelop and maintain cybersecurity documentation supporting RMF and Assessment & Authorization (A&A) activities, including System Security Plans (SSPs), Security Assessment Reports (SARs), Plans of Action and Milestones (POA&Ms), risk assessments, and related artifacts. Our growing reach extends across 17 states, 116 countries, and 5 continents, where our team of dynamic professionals collaborates to deliver unparalleled program and project management services.
NewEndpoint Security Engineer III - Nessus CACI International Inc.Endpoint Security Engineer III - NessusSpringfield, VA$75,200–$158,100 / yearWorking knowledge of maintaining Enterprise Cyber Security Engineering requirements utilizing all or some of the following tools: Tenable Suite that include Security Center, Nessus Scanners, Nessus Manager with hands-on administrator experience. Pay Range: There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications.
Computer Network Defense Analyst (CNDA) BytoaComputer Network Defense Analyst (CNDA)Annapolis Junction, MarylandResponsibilities : Use information collected from a variety sources (e.g., intrusion detection systems, firewalls, network traffic logs, and host system logs) to identify potential vulnerabilities, respond to cyber events that occur, and defend against events that might occur. Relevant experience must be in computer or information systems design/development, programming, information/cyber/network security, vulnerability analysis, penetration testing, computer forensics, information assurance, and/or systems engineering.
Security Systems Engineer NorthHill TechnologySecurity Systems EngineerDistrict of ColumbiaSystem Administration: Hands-on experience managing multi-site network environments (Windows/Linux), including experience with McAfee’s ePO, Rogue Sensor Detection, HIPS, Policy Auditor (PA), Data Loss Prevention (DLP), etc. Desired Skills Technical Communication: Strong oral and written communication skills, with the ability to produce clear technical documentation and effectively interact with various teams.
Lead, Cryptographic Security Engineer MasterCardLead, Cryptographic Security EngineerArlington, VA$161,000–$266,000 / yearAll activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must: Abide by Mastercard's security policies and practices; Ensure the confidentiality and integrity of the information being accessed; Report any suspected information security violation or breach, and. Mastercard is developing the next generation of applications and services to enable consumers and businesses to securely, efficiently, and intelligently conduct payment transactions, and is leveraging state-of-the-art cryptographic practices to protect its assets.
Database Security Engineer American International GroupDatabase Security EngineerReston, VAAbility to understand security risks and controls, to analyze various methods of controlling information security problems, determine the strengths and weaknesses of each method and implement the best cost-justified solution. Evaluating updates to new/existing database security controls by determining the strengths/weaknesses and coordinate the testing and implementation of the new/enhanced controls with all business partners that are affected.
Endpoint Security Solutions (ESS) Systems Engineer – Level 1 RividiumEndpoint Security Solutions (ESS) Systems Engineer – Level 1Quantico, VirginiaThe successful candidate will provide technical leadership, support vulnerability management and compliance initiatives, contribute to incident response activities, and help maintain a secure and resilient enterprise security posture across complex Windows and Linux environments. RiVidium Inc. is seeking an Endpoint Security Solutions (ESS) Systems Engineer - Level 1 to provide senior-level engineering support for enterprise endpoint security operations within a mission-critical Department of Defense environment.
NewSecurity Engineer CiscoSecurity EngineerFulton, MarylandThe applicable full salary ranges for this position, by specific state, are listed below: New York City Metro Area: $155,000.00 - $256,000.00 Non-Metro New York state & Washington state: $138,100.00 - $227,900.00 * For quota-based sales roles on Cisco’s sales plan, the ranges provided in this posting include base pay and sales target incentive compensation combined. Talos defends Cisco customers against known and emerging threats, discovers new vulnerabilities in common software, and interdicts threats in the wild before they can further harm the internet at large.
Systems Engineering Associate - Govcloud [Salesforce National Security] Salesforce.com, Inc.Systems Engineering Associate - Govcloud [Salesforce National Security]Herndon, VA$111,000–$122,000 / yearWorking closely with counterparts in the Infrastructure and R&D organizations, this organization provides a team of engineers monitoring cloud service availability and ready to swiftly repair any service-impacting issues. Expertise in CLI enterprise support of Unix variants (Linux/Solaris/BSD) as well as strong Linux/UNIX knowledge with significant exposure to Red Hat Enterprise Linux and Solaris.
Systems Engineering Associate - GovCloud [Salesforce National Security] SalesforceSystems Engineering Associate - GovCloud [Salesforce National Security]Herndon, VirginiaWorking closely with counterparts in the Infrastructure and R&D organizations, this organization provides a team of engineers monitoring cloud service availability and ready to swiftly repair any service-impacting issues. Expertise in CLI enterprise support of Unix variants (Linux/Solaris/BSD) as well as strong Linux/UNIX knowledge with significant exposure to Red Hat Enterprise Linux and Solaris.
Security Service Technician Integrated Security TechnologiesSecurity Service TechnicianHerndon, VAAs a Service Technician, the successful candidate will need to be hard-working, detail-oriented, highly organized and able to work independently to maintain security hardware in the client's and Unlimited Technology's best interests. We secure the facilities and networks of the world's leading brands and critical infrastructure and are recognized leaders in the physical and IT security, cyber, and managed services industries.
Network Engineer System OneNetwork EngineerWashington, DC$70–$80 / hourCertifications: AWS Advanced Networking Specialty (preferred), Palo Alto PCNSE, DoD 8570/8140 IAT II. Apply AWS networking depth including TGW, VPC peering, Direct Connect, DC Gateway, NAT/PAT design.
Decentralized Services and Networks Tech SETA-DARPA, TS/SCI Blue Sky InnovatorsDecentralized Services and Networks Tech SETA-DARPA, TS/SCIArlington, VA$150,000–$250,000 / yearThe ideal candidate should possess technical expertise and experience in network engineering of DOD classified networks, notably the design, implementation, operations, and maintenance of enterprise, tactical, or expeditionary communications networks. Candidates will support development of secure, variable-trust networks of decentralized services with novel interaction models, at enterprise scale across a wide variety of transport types and levels of service.
Information Systems Security Officer (HPC) VibrintInformation Systems Security Officer (HPC)Annapolis Junction, MDFull timeBy joining this particular High Performance Computing (HPC) prime contract, you'll help maintain and advance the computing infrastructure that powers unprecedented mission-critical analysis, scientific discovery, and scalable national security outcomes.______________________________________________________________________As an ISSO on this program, you will help deliver enhanced HPC capabilities across multi-vendor HPC servers, HPC clusters, and specialized processing environments. You'll have the opportunity to grow your security skills technical expertise alongside highly skilled engineers, collaborate with exceptional teammates, and directly contribute to missions that strengthen our nation's security.