Title: Data Engineer
Location: Herndon, VA
*Clearance: *Active TS/SCI w/ Polygraph needed to apply *
Company Overview:
Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government. Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission. Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation’s toughest and most secure problems. If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don’t look any further than Cornerstone Defense.
Benefits Overview:
Cornerstone Defense offers a very comprehensive benefits package including, but not limited to: Medical, Dental and Vision Plans * Generous PTO Policy * 401(k) * HSA and FSA options * Life and Disability Insurance * Tuition Reimbursement and Training * Perks at Work Discount Program * Referral Program * Leads Generation Program * CollegeAmerica 529 * Fitness Reimbursement Program * Travel Assistance * Norton Lifelock Benefit Solutions * Life Planning Financial & Legal Services *
| We are looking for a skilled Python Data Engineer to join our team. As a Python Data Engineer, you will be responsible for designing, developing, and maintaining data pipelines. We are looking for someone to design, build, and optimize systems for data collection, storage, access, and analytics at enterprise scale. Join a team that creates data pipelines to collect and convert raw Cyber related data into formats usable by our cyber analysts and data scientists. Collaborate within and across teams to support delivery and educate end users on complex data products/analytic environment. Perform data and system analysis, assessment and resolution for complex defects and incidents and correct as appropriate. Your role and responsibility are to make data available, accessible, and secure to stakeholders. Responsibilities include, but are not limited to: * Build and operationalize complex data solutions, correct problems, apply transformations, and recommending data cleansing/quality solutions. * Operate and manage a custom codebase and its integration with open-source/vendor data platforms and products. * Perform analysis of complex sources to determine value and use and recommend data to include in analytical processes. * Incorporate core data management competencies including data governance, data security and data quality. * Test data movement, transformation code, and data components. * Create robust and resilient data pipelines to connect data sources to analytics tools * Platform support including problem solving and debugging, especially for production issues.
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Title: Network Engineer/Analyst
Location: Herndon, VA
*Clearance: *Active TS/SCI w/ Polygraph needed to apply *
Company Overview:
Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government. Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission. Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation’s toughest and most secure problems. If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don’t look any further than Cornerstone Defense.
Benefits Overview:
Cornerstone Defense offers a very comprehensive benefits package including, but not limited to: Medical, Dental and Vision Plans * Generous PTO Policy * 401(k) * HSA and FSA options * Life and Disability Insurance * Tuition Reimbursement and Training * Perks at Work Discount Program * Referral Program * Leads Generation Program * CollegeAmerica 529 * Fitness Reimbursement Program * Travel Assistance * Norton Lifelock Benefit Solutions * Life Planning Financial & Legal Services *
| We are seeking a Cyber Network Defense Analyst in Herndon, VA. As a Cyber Network Defense Analyst on our team, you will use your expertise in Host Based Intrusion Detection Systems (IDS), Intrusion Prevention Systems (IPS) and specialized network defense to provide innovative and creative solutions to challenging cyber security problems. Manage and administer the tuning of rules, signatures, and custom content for CND applications and systems. Identify potential conflicts with implementation of any CND tools within the enterprise and develop recommendations to remediate these conflicts. You will utilize the latest cyber tools available and assist with creating new ones while allowing you to advance the nation's information security posture. Responsibilities include, but are not limited to: * Provide malicious code detection, intrusion detection, and information security tool development and integration. * Utilize forensic analysis to identify malware, misuse, and/or unauthorized activity. * Investigate and report on virus and malware alerts or incidents to determine root cause, entry point of code and damage risk. * Analyze all data sources, including Internet, Intelligence Community (IC) reporting, security events, firewall logs, and other data sources to identify malware, misuse, unauthorized activity or other cyber security related concerns. * Track intelligence using open source and classified sources to identify malicious code threats and provide solutions to counteract that threat. * Create, edit, and manage signatures, custom rules and filters for specialized network defense systems including but not limited to, Network and host-based IDS, IPS, firewalls and web application firewalls, Security Orchestration, Automation and Response (SOAR), Proxy, and Security Information and Event Management (SIEM) systems * Prepare data analytics and reporting. |
| * 15 years of experience in Network Defense, Network Operations, Cybersecurity, Network Engineering, Security Engineering, Information Security, Systems Architecture or Data Analysis * Experience writing script in programming languages such as Python, JavaScript, Yara or Snort * Experience using SIEM tools for case development and application * Experience with network security applications, protocols, and associated hardware * Knowledge of enterprise cyber defense technologies such as SIEM systems, SysMon, network and host based IDS and IPS, network and host-based malware detection and prevention, Endpoint Detection & Response (EDR) and Network Detection & Response (NDR), Network and Host malware detection and prevention (EDR/NDR) tools, forensics tools and applications, Web/Email gateway security technologies, Security Orchestration, Automation and Response (SOAR) and cloud based platforms such as Azure, AWS, or Google * Experience with MITRE ATT&CK * Experience with Splunk or Splunk Enterprise Security * Full Scope Clearance
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Title: Data Engineer
Location: Herndon, VA
*Clearance: *Active TS/SCI w/ Polygraph needed to apply *
Company Overview:
Cornerstone Defense, in partnership with our military, intelligence, and civil government customers, supports U.S. operations worldwide through the use of many different types of intelligence, satellite, and cyber technologies. Cornerstone’s Intelligence Sector provides solutions to the United States Government for information collection, operations, exploitation and dissemination, and research activities. Our Team specializes in software development, cloud architecture, systems and network engineering, systems integration, agile management, as well as targeting operations and intelligence analysis. Our support to our mission customers includes cyber network operations, exploitation and defense, signals intelligence, human intelligence, and critical missions and networks.
Network Engineer
Reston, VA
Position Overview:
We’re looking for a skilled Network Engineer with virtualization experience to join our team! In this role, you will play a crucial part in designing, implementing, and building our low-side network services that support the program. The successful candidate will possess a strong understanding of network architecture, networking protocols, virtualization technologies and security measures essential for maintaining high availability and performance in hybrid cloud environments and will collaborate with various teams to ensure seamless integration of cloud services, optimizing network infrastructure to support application performance and reliability. You will troubleshoot and resolve network-related issues, leveraging your expertise to enhance operational efficiency and support business objectives. This position requires a proactive individual who can stay current with network industry trends and emerging technologies. We value collaboration and innovation, and we're excited to have someone who enjoys problem-solving and is eager to learn new technologies.
Responsibilities
• Design and implement a secure networking solution currently on-prem to a hybrid version built on AWS.
• Monitor network performance and troubleshoot issues as they arise.
• Configure and maintain routers, switches, and other networking hardware.
• Ensure network security through effective management of firewalls and VPNs.
• Collaborate with the “in house” development teams to integrate new technologies into the existing network.
• Collaborate with ISSEs to establish best practices for network security.
• Monitor network performance and troubleshoot connectivity issues across the environment.
• Implement robust security measures to protect sensitive data and ensure compliance with regulatory standards.
• Prepare documentation for network configurations and procedures.
• Conduct regular assessments, audits and scans of network systems to enhance security and performance.
• Develop and maintain network documentation, including diagrams and operational procedures.
• Stay current with industry trends and emerging technologies in cloud & networking.
• Champion automated solutions for network monitoring and management.
Required Skills:
• Bachelor's Degree in Computer Science, Information Technology, or a related field.
• Proven experience working with hybrid networks, commercial cloud platforms, or similar role, particularly in the Defense & Intelligence Communities.
• Experience with scripting languages such as Python or Bash for automation.
• Strong knowledge of at least one of the providers (AWS, Azure, Google Cloud Platform, etc)
• Familiarity with networking protocols and technologies, including TCP/IP, VPNs, VPCs and firewall technologies, both on-prem and virtual.
• Excellent troubleshooting, problem-solving skills and the ability to work collaboratively in a team-oriented environment.
• Strong communication skills and the ability to work independently
• TS/SCI
Desired Skills:
• Experience with network monitoring tools.
• Familiarity with virtualization technologies and SDN concepts.
• AWS Certified Solutions Architect, CompTIA Network+, or equivalent certification is highly desirable.
Company Overview:
Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government. Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission. Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation’s toughest and most secure problems. If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don’t look any further than Cornerstone Defense.
As an Entry-Level Technical Recruiter at Cornerstone Defense, you’ll have the opportunity to jumpstart your career by building relationships, curating talent pipelines, and learning the ins and outs of the recruiting process. We’re seeking an energetic, motivated individual who’s eager to explore the fast-paced world of government contracting. In this role, you’ll be mentored by industry experts, gaining hands-on experience and invaluable insights into technical recruiting, resource management, and the unique demands of defense contracting.
You’ll work closely with our Service Delivery team, connecting top-tier talent with mission-critical roles that support national security. Your efforts will directly influence our growth, culture, and success in delivering cutting-edge solutions to complex challenges.
Why Cornerstone Defense?
What You’ll Do:
Who You Are:
Ready to Take the Next Step?
If you’re looking for more than just a job – if you want to build a career in a company where you’re valued, supported, and pushed to grow – Cornerstone Defense is where you belong. Apply today to join a team that’s making a real difference.
Principal Systems Engineer, Linux
McLean, VA
The Program is comprised of Linux (80%), Windows (20%), virtualization, storage, network, HW, and data center engineers that works as a team and offers rewarding opportunities to think outside the box in order to deliver innovative and sustainable IT environments to our customers.
The System Administrators work both independently and as a member of an integrated product team supporting a wide variety of basic and complex computing and network configurations and must have proven Linux experience.
The on-site system administrator will support the installation, configuration, maintenance, failure analysis and recovery, performance monitoring, data storage management, and security management of the data center environment.
The system administrator will have experience in at least one, preferably two, scripting languages (shell, Perl, Powershell, Python, etc.) and shall have proven experience administering Linux operating systems in the conduct of their duties. The right candidate will have proven experience in problem solving.
Mandatory Skills:
– Architecting, deploying, and managing large Linux networked environments including deployment and configuration
-Installing, configuring, updating and removing system and application software
-Hardening Linux server installations
-Installing, configuring, updating and removing system hardware (servers, workstations, transceivers, network interface cards)
-Configuring NFS, SAMBA, and SAN
-Monitoring and allocating system resources (CPU, memory, and storage space)
-Proven experience creating, implementing, and maintaining scripts for process automation, infrastructure monitoring, and proactive reporting
-Auditing system log files, to include compliance audits
-Diagnosing and troubleshooting hardware and software problems
-Documenting hardware and software configurations, maintenance history, and backup history
-Implementing up-to-date system policies and procedures
-Updating/patching system operating systems
-Proven experience in all aspects of managing large Linux environments including the use of configuration management tools like Puppet and Ansible for centralized management and configuration of systems to enforce security controls
-Ability to utilize analysis tools to resolve complex network, systems, and application performance problems
-Responding to inquiries concerning all aspects of computer and network operations
-Creating and managing user/group accounts (ex: Active Directory (AD))
Minimum Education & Qualifications:
Bachelor’s degree in computer science, information systems, engineering, mathematics, or equivalent experience, and four (4) years of relevant experience (see below bullets).
Equivalent military training and/or experience in an information technology field will be considered in lieu of a degree.
Five (5) years or more of total intelligence community relevant work experience as a system administrator
Seven (7) years’ experience as a system administrator
Optional Skills:
Experience with Kubernetes; upgrading Linux systems and transition to new configurations management environments; C2S/UC2S policies and procedures; familiarity with creation of S3/GLACIERS instances and with Rapid7 vulnerability scans and reports.
Network Engineer, Senior
McLean, VA
Desirable:
– Understanding of how mission enclaves communicate with Enterprise networks
– Familiarity with the Enterprise ticketing system
– Familiarity with Cisco Firewall Management Center to manage Firepower firewall
– Experience with Cisco Nexus Ethernet switching platforms (Nexus 5500, 5600, 7700, and 9500)
– Experience with Cisco MDS Fibre Channel switching platforms (MDS 9000)
– Familiarity with Storage Area Networking (SAN) and Fibre Channel protocols and standards
– Familiarity with Linux operating system
– Familiarity with SolarWinds network management/monitoring tool
– Familiarity with virtual appliances (switches, firewalls, etc…)
– Familiarity with JIRA
– Experience working in a ‘mission-like’ environment (outside of Enterprise comms)
– AWS/Cloud familiarity
Title: Applications Developer
Location: Herndon, VA
*Clearance: *Active TS/SCI w/ Polygraph needed to apply *
Company Overview:
Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government. Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission. Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation’s toughest and most secure problems. If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don’t look any further than Cornerstone Defense.
Seeking a Full Stack DevOps Applications Developer to support applications development and operations and maintenance of a variety of systems and initiatives focused on streamlining operations, automating processes, and aligning customer solutions to the overarching digital architecture. The ideal candidate will help promote state-of-the-art IT solutions, collaborating with IT mission partners to share technology and lessons learned and ensure records management processes and requirements are included in the early design stages of IT solutions across the Intelligence Community. Additionally, this individual will work in concert with the customer technical interfaces to ensure future plans for technology are in line with the plans for the overall customer architecture.
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Title: Software Developer
Location: Herndon, VA
*Clearance: *Active TS/SCI w/ Polygraph needed to apply *
Company Overview:
Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government. Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission. Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation’s toughest and most secure problems. If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don’t look any further than Cornerstone Defense.
This role requires a highly skilled problem-solver who has the business knowledge and technological expertise to build upon, maintain, and grow an innovative data analytics platform that supports the ever-changing needs of our customers.
Required Qualifications:
2+ years' experience with programming and scripting
Knowledge of software version control systems
Experience consuming Application Programming Interfaces (APls) and manipulating large datasets
Experience with defining enterprise information system requirements, performing system or application design, developing capability prototypes, and transitioning applications to production
Knowledge of AWS cloud services, such as Lambdas, EC2s, or S3
Knowledge of analytic platforms, such as Splunk, Elasticsearch/Kibana or others
Current/Active TS/SCI with polygraph clearance
Preferred Qualifications:
Experience programming an/or scripting in Python
Experience using Git
Experience working in AWS or other cloud environments
Knowledge of drafting technical program documentation, such as end user operational instructions or training guidelines
Ability to collaborate with others who are conducting research in the same, similar, or different areas (strong teamwork skills)
Effective research and analytical skills
Excellent problem-solving skills
Strong organizational skills and attention to detail
Strong oral and written presentation skills and the ability to brief others on your findings and recommendations
Title: Share Point Developer Senior
*Clearance: *Active TS/SCI w/ Polygraph needed to apply *
Company Overview:
Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government. Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission. Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation’s toughest and most secure problems. If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don’t look any further than Cornerstone Defense.
| • Knowledge of Server OS maintenance, and SharePoint farm management/maintenance to a degree fitting LCAT requirements and candidate’s skills. • Strong experience with SharePoint Server 2016 and 2019 required. Back-end SharePoint experience highly preferred over front-end/design experience. • Strong previous experience with Windows Server 2016 and 2019, including standard server maintenance, OS patching, and migration. • Demonstrate excellent customer service skills and be able to assist users through a variety of remote support capabilities (ticketing, phone, email, etc.). • Previous experience managing/configuring SharePoint farms, web apps, and site collections manually and via PowerShell preferred. Design and deployment of SharePoint farm(s) highly desired. • IIS, Microsoft SQL Server, Active Directory, Lightweight Directory Access Protocol (LDAP) experience desired. •.NET, C#, Rest API/jQuery, JavaScript, HTML 5, CSS, Optimal IdM, user liaison experience, and writing documentation a strong plus. • Experience with SharePoint associated products (Designer, Visio, InfoPath, Visual Studio, PowerShell,) as well as identity and access management. • DoD 8570 Compliance with IAT level 1 is required. |
Title: Software Engineer
Location: Herndon, VA
*Clearance: *Active TS/SCI w/ Polygraph needed to apply *
Company Overview:
Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government. Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission. Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation’s toughest and most secure problems. If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don’t look any further than Cornerstone Defense.
Required Education, Experience, & Skills :
We are looking for experienced Software Developers to join our technology-based program supporting a key Government customer. A bachelor’s or master’s degrees in computer science are preferred with a minimum of three (3) year’s relevant experience with the following skillsets:
1+ years working in AWS C2S
2+ years' experience participating in agile activities.
Infrastructure as a code language (Ansible, Puppet, or chef as examples)
Eclipse developmental duties Git Hub, Dev Ops, Java and Python.
Candidate should have experience in security review of applications and infrastructure.
2+ Years' experience participating in agile activities.
3+ years of RECENT Java or Python or .Net experience
3+ years of RECENT Database Administration (oracle or MYSQL) experience
Research new technologies in object-oriented programming.
Experience in Cloud based services.
Works well in an engineering team environment with other teammates who varied skills levels.
Ability to mentor others
Preferred Education, Experience, & Skills :
Experience with infrastructure automation technologies like Docker, Vagrant, etc.
Experience with build automation technologies like Maven, Jenkins, etc.
Experience with with building APIs and services using REST, SOAP, etc
Experience with scripting languages like Perl, Shell, etc.