ManTech is seeking a motivated, career and customer-oriented Information Systems Security Engineer to join our team in Linthicum, MD. The position is part of a team that provides security engineering in the Linthicum location and will provide implementation and/or integration of secure networking, computing and enclave environments.Responsibilities Included but are not limited to:Responsible for providing expertise in complying with Systems Security Certification & Accreditation (C&A) processes, to include discovery meetings, achieving Interim Approval to Test (IATT) and in obtaining final Approval to Operate (ATO) status for Systems Security Plans (SSP) associated with all mission systems to gain successful accreditation as well as manage all security relevant changes to the mission systems, assuring SSP documentation is up-to-date and ATO status is maintained.Perform/review technical security assessments of computing environments for non- complianceValidate and verify system security requirements definitions and analysis and establishes system security designsAssist architects and systems developers in the identification and implementation of appropriate information security functionalitySupport the building of security architectures and enforce the design and implementation of trusted relations among external systems and architecturesAssess and mitigate system security threats/risks throughout the program life cycleContribute to security planning, assessment, risk analysis, risk management, certification and awareness activities for system and networking operationsReview certification and accreditation documentation and provide feedback on completeness and compliance of its content.Minimum Qualifications:Bachelor's degree in Computer Science, Information Assurance, Information Security System Engineering, or related discipline from an accredited college or university7 years experience as an Information Systems Security Engineer on programs and contracts of similar scope, type, and complexity.In lieu of a degree four (4) years of additional Information Systems Security Engineer experience may be substituted for a bachelor's degree.IASAE Level 2 Certificate required.Clearance Requirements:Must have a current/active TS/SCI w/ Polygraph.Physical Requirements: The person in this position must be able to remain in a stationary position 50% of the time.Must communicate with co-workers, management, and customers, via email, phone, and or virtual communication, which may involve delivering presentations.

ManTech is seeking a motivated, career and customer-oriented Enterprise Systems Engineer to join our team in McLean, VA.Responsibilities include but are not limited to:Develop complex, enterprise solutions across the appropriate engineering environments to meet business and mission requirements or enhance performancePlan, conduct, and oversee the technical aspects of large, complex projects; coordinate the efforts of technical support staff in the performance of assigned projectsPerform full-stack software engineering development using Agile methodologiesDevelop and execute business process analysis, reengineering and digital transformation that adapt to user needs and requirements and meet business goalsOversee the day-to-day operation of Tier 1 - 3 support as needed (troubleshooting, problem resolution support, and Root Cause Analysis (RCA)Develop and apply advanced methods, theories and research techniques in the investigation and solution of highly complex system requirements and problemsProvide complex technical consultation on current and proposed systems to other organizations and clientsEnhance web-based applications to maximize User Experience (UX) and accessibility standardsBasic Qualifications:Bachelor’s Degree in a technical field (Science, Technology, Engineering, and Mathematics (STEM))7+ years serving as an Engineering Lead or similar work leading high performing teamsExperience in maintaining compliance with Natural Industrial Security Program Operating Manual (NISPOM) requirements and Intelligence Community Directives (ICDs)Familiarity with virtualizing servers, storage, networks, desktop and applications to improve efficiency, security and scalabilityFamiliarity with access control models and network securitySolid understanding of server operating systems (Linux, Windows)In-depth understanding of communication protocols and routing protocolsPreferred Qualifications:Advanced degrees and certifications are desired (e.g. - MCSE, CCNP, or CISSP)Experience supporting configuration management in a multi-region environmentExperience building PaaS or internal cloudAdvanced experience in systems integration, the ability to write integration code for ServiceNowClearance Requirements:Must have a current/active TS/SCI w/ polygraph.Physical Requirements:The person in this position must be able to remain in a stationary position 50% of the time. Occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers, via email, phone, and or virtual communication, which may involve delivering presentations.

ManTech seeks a motivated, career and customer-oriented Senior Network Engineer to join our team in Reston, VA location. This is an onsite position.The Network Engineer candidate will work with other Network and Systems Engineers to design, build, monitor, maintain, and upgrade all program networks to ensure data is consistently available and flowing properly.Responsibilities include but are not limited to:Designing, building, monitoring, maintaining, and upgrading all program networks and communications linksMonitoring and analyzing networks and communications links to identify and resolve architecture, provider, environment, or other issuesImplementing and maintaining effective tools to evaluate/analyze data movement and ensure data integrity throughout the networkWorking with engineering teams to troubleshoot integration issues and to maximize network and system performanceEstablishing appropriate network monitoring and early warning mechanisms to proactively identify potential issues before they impact operationsPerforming performance testing and tuning for all network and Cloud infrastructuresWorking with engineering teams to resolve reported problems and interfacing with third party vendors for monitoring, troubleshooting, tracking, and reporting metricsBasic Qualifications:10+ years of relevant experience serving as a Network Engineer or performing similar technical dutiesStrong experience with network hardware configuration and maintenance in large-scale environmentsStrong experience with relevant networking and firewall technologies such as Cisco and Palo AltoStrong network administration experience in areas such as DNS, routing, firewall configuration, scripting and automationStrong Cloud experience, including remote management, with technologies such as AWSStrong experience performing Tier 2-4 network troubleshooting and resolving issuesPreferred Qualifications:Prior experience managing and maintaining complex networks used to transport data worldwideAbility and willingness to travel internationally, if requiredClearance Requirements:Must possess an active/current TS/SCI w/ polygraph.Physical Requirements:Must be able to be in a stationary position more than 50% of the timeMust be able to communicate, converse, and exchange information with peers and senior personnelConstantly operates a computer and other office productivity machinery, such as a computerThe person in this position frequently communicates with co-workers, management, and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situationsThe person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc.

ManTech seeks a motivated, career and customer-oriented Security Engineer to join our team in Herndon, VA to design, implement, and maintain secure environments that align with compliance standards in support of a high priority mission at one of our National Intelligence Customers.This role requires an individual with a strong technical foundation in cybersecurity, a deep understanding of federal security frameworks, and a proactive approach to protecting mission-critical systems.Responsibilities include but are not limited to:Implement and maintain cybersecurity solutions across classified and unclassified environments.Perform risk assessments, vulnerability scans, and system hardening in compliance with NIST 800-53 and RMF.Support the preparation and submission of security documentation for Authority to Develop (ATD) and Authority to Operate (ATO) under IC guidelines.Collaborate with system owners, ISSOs, ISSEs, ISSMs, engineers, and auditors during security assessments and continuous monitoring.Monitor and respond to security incidents, performing root cause analysis and remediation.Integrate security controls into DevSecOps pipelines and cloud architectures (AWS, Azure, GCP or Oracle).Support development and implementation of security policies, plans, and SOPs.Stay current on evolving federal cybersecurity directives, threats, and compliance requirementsMinimum Qualifications:Bachelor’s degree OR 4+ years of additional equivalent experience a related field7+ years of experience in cybersecurity or related IT security rolesExperience with NIST Risk Management Framework (RMF), FedRAMP, or DoD Cybersecurity Maturity Model Certification (CMMC)Hands-on experience working in air-gapped Cloud environmentsKnowledge of system/network security principles and incident response practicesExperience supporting the Intelligence CommunityPreferred Qualifications:DoD 8570.01-M IAT Level II or III certification (e.g., Security+, CISSP, CEH, CISM)Knowledge of STIGs, SCAP tools, and secure system baseliningHands-on experience with security tools (e.g., ACAS, Splunk, Tenable, Palo Alto, CrowdStrike, or similar)Scripting or automation experience (Python, Bash, PowerShell) to support security operationsClearance Requirements:Must have active TS/SCI with Full Scope PolygraphPhysical Requirements:Must be able to remain in a stationary position 50% of the time.Needs to occasionally move about inside the office to access file cabinets, office machinery, etc.Frequently communicates with co-workers, management, and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations.

ManTech seeks a motivated, career and customer-oriented Oracle Cloud Engineer to join our team in Herndon, Virginia. The Oracle Cloud Engineer will be tasked to design, implement, and maintain cloud-based solutions on Oracle Cloud Infrastructure (OCI) supporting a high priority mission at one of our National Intelligence Customers. In this role, you will work closely with architects, DevOps, and database teams to optimize Oracle cloud environments, ensure security and scalability, and support mission-critical applications.Responsibilities include but are not limited to:Design & Deploy: Architect and deploy scalable and secure solutions onOracle Cloud Infrastructure (OCI).Automation & Optimization: ImplementIaC (Infrastructure as Code)using Terraform, Ansible, or OCI Resource Manager to automate cloud provisioning.Database & Storage Management: Manage Oracle Cloud databases (Autonomous DB, Exadata, Oracle RAC) and storage solutions (Object Storage, Block Volumes).Networking & Security: ConfigureVCNs, subnets, load balancers, and security listsfor cloud applications.Monitoring & Performance Tuning: Use OCIMonitoring, Logging, and Performance Hubto optimize cloud resources and troubleshoot performance bottlenecks.Disaster Recovery & High Availability: Designbackup, replication, and failoverstrategies for critical workloads.Cloud Cost Optimization: Monitor resource utilization and implementcost-saving strategiesto optimize OCI spending.Compliance & Security: Ensure compliance with industry security standards (NIST 800-53) and implement best practices forIAM policies and access controls.Minimum Qualifications:7+ yearsof hands-on experience with a Cloud Service Provider (CSP) orOracle Cloud Infrastructure (OCI)Proficiency in deploying and managing OracleAutonomous Database, Oracle Exadata, and Oracle Cloud VM instancesExpertise inTerraform, Ansible, or OCI Resource Managerfor infrastructure automationStrong understanding ofnetworking concepts (VCNs, Load Balancers, VPN, FastConnect)Experience withOracle Identity and Access Management (IAM)and security policiesHands-on experience withLinux environments, scripting (Bash, Python), and CI/CD pipelinesKnowledge ofCloud monitoring toolssuch as Oracle Cloud Monitoring, Prometheus, or GrafanaPreferred Qualifications:Hands-on experience working with and developing on OCI, particularly 2 years of consulting experienceOracle Cloud certifications(e.g., Oracle Cloud Infrastructure Architect Associate/Professional)Experience withmulti-Cloud environments (AWS, Azure, GCP, OCI) and hybrid cloud solutionsBackground inDevOps, Kubernetes, or containerized deployments on OCI or another cloud providerStrong knowledge ofOracle Database Administration (DBA)and SQL performance tuningClearance Requirements:Must have active TS/SCI with Full Scope PolygraphPhysical Requirements:Must be able to remain in a stationary position 50% of the timeNeeds to occasionally move about inside the office to access file cabinets, office machinery, etc.Frequently communicates with co-workers, management, and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations.

ManTech seeks a motivated, career and customer-oriented LeadData Engineer to join our Data and AI Practice onsite in Chantilly and/or Herndon, VA. You will be a part of a dynamic, cross-functional team focused on transforming how Government clients extract insights from data to achieve critical mission objectives.This leadership role involves guiding a team and collaborating with others to implement this transformative process. You will be responsible for providing expert guidance and support in the analysis, design, implementation, and optimization of complex, enterprise-wide, cloud-based data migration solutions that align with mission goals and requirements.Responsibilities include but are not limited to:Lead the design, development, and deployment of robust data pipelines to ingest, transform, and integrate data from various systems and networks, ensuring seamless data flow.Collaborate with cloud and system architects to establish secure and efficient data transfer protocols among different networks and systems.Work with data consumers to develop data requirements to support analytics and machine learning tasks.Implement data pipelines and data storage solutions to support analytic workflows.Optimize data pipelines and storage solutions for performance, ensuring low latency and high throughput for real-time and batch data processing.Implement robust security measures to protect sensitive data and ensure compliance with relevant data security policies and practices.Minimum Qualifications:Bachelor’s degree in Computer Science, Information Technology, Engineering, or a related field and at least 10 years of experience in data engineering, data architecture, or related rolesExperience with data replication and change data capture tools such as Oracle GoldenGateExperience with cloud services from providers such as Oracle and their data storage and database servicesDemonstrated ability to lead and manage a team of engineersDirect line management experience, including project, people, customer, and financial managementExperience with data warehousing, data lakes, and big data technologiesProficiency in programming languages such as Python, Java, or SQL. Experience with SQL and NoSQL databasesPreferred Qualifications:Master’s degree in Computer Science, Information Technology, Engineering, or a related field.Familiarity with data security and compliance frameworks (e.g., NIST framework).Cloud certifications such as AWS Certified Developer, Oracle Cloud Infrastructure.Familiarity with records management policies and procedure.Familiarity with big data technologies like Hadoop, Spark, and Kafka.Knowledge of data governance and metadata management.Clearance Requirements:Must possess a current and active TS/SCI with polygraphPhysical Requirements:Must be able to be in a stationary position more than 50% of the timeMust be able to communicate, converse, and exchange information with peers and senior personnelConstantly operates a computer and other office productivity machinery, such as a computerThe person in this position frequently communicates with co-workers, management, and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situationsThe person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc.