Network Security Engineer

1 month ago
Job ID
# of Openings
Information Technology


SC3 is a leading provider of high-end mission support, consulting and technology solutions to the federal government in defense, intelligence, and civil markets, and to major corporations and nonprofit organizations. SC3’s national security efforts reach across the intelligence community and Department of Defense, providing full life-cycle operational and cyber support and differentiated capabilities to meet our customer’s challenging mission.


In addition to our government services area, SC3 provides cutting-edge competitive intelligence and strategic management consulting to commercial clients. Private industry leaders from the financial, health care, manufacturing and other sectors turn to SC3 to ensure that they have access to the most relevant, current, and strategically important information – not only to grow their businesses, but also to protect them.


Experience: Performs all procedures necessary to ensure the safety of information systems assets and to protect systems from intentional or inadvertent access or destruction. The candidate shall support the development and implementation of a Security Operation Center, an Incident Response Plan, and SANS twenty critical security controls. The candidate must have experience which includes network security operations, incident monitoring, detection and response, malware analysis, vulnerability management, FISMA reporting and compliance, assessment, authorization and computer and network forensics.



  • Build, design, test and deploy perimeter security systems.
  • Working knowledge of any of the following applications: Cisco Firewall appliances, Cisco AnyConnect, Cisco IronPort SMA and WSA, Cisco Advanced Malware Protection (AMP) and FireAMP, Lancope StealthWatch, AccelOps, Clearswift MIMEsweeper, ForeScout CounterACT
  • Working knowledge of Cisco Firewall administration and log analysis
  • Working knowledge of Cisco Router/Switch administration and log analysis
  • Troubleshooting network issues on the LAN to/from provider of the WAN
  • Interacts with co-workers, vendors, customers and representatives of other organizations to obtain and disseminate information, advise on projects, resolve conflicts, set priorities, coordinate activities, complete projects within time and budget constraints, and provide assistance.
  • Maintains systems to protect data from unauthorized users.
  • Identifies, reports, and resolves security violations.
  • Familiar with standard concepts, practices, and procedures within a particular field.
  • Working expertise with protocols: TCP/IP, HTTP, HTTPS, FTP, SSH, VPN
  • Directs compilation of records and reports concerning perimeter operations and maintenance to analyze the performance of perimeter security systems.
  • Provides input to the problem management process, including assessing and evaluating software and hardware anomalies. Supports the root cause analysis efforts to determine problems and develop remediation activities. Interfaces with vendor support service groups to ensure proper support during outages or periods of degraded system performance.
  • Manages the transition to operations of perimeter security devices.
  • Supports the configuration testing of replacement perimeter devices
  • Plans, documents, and implements hardware and software refreshes
  • Create and maintain standard operating procedures, work instructions and guides for new and/or existing perimeter hardware and software.
  • Attend weekly teleconferences, onsite meetings, and participates in working groups, as related to constant changing security environment.
  • Manage various IP and domain watch lists, blacklists and whitelists.
  • Conduct incident response and coordinate response, triage and recovery activities for security events and recommend/perform remediation actions after investigations.
  • Maintain and monitor perimeter security tools to perform log/performance analysis and tuning.
  • Analyze network traffic via NetFlow, packet captures, and other logs to record event and incident details.
  • Evaluate, test, and implement suitable security tools and controls such as advance malware protection and Advanced Persistent Threat Detection to proactively assist with prevention, monitoring, and detection of security events within the infrastructure environment.
  • Ensure the confidentiality and integrity of information and assets by continuously following, evaluating, recommending, and delivering new or improved information security processes, procedures and solutions in accordance with industry standards and best practices.
  • Complete implementation plans and Change Requests for submission to Change Control Board.
  • Form, develop, and maintain affiliations with internal and external users and vendors to obtain solutions and address issues related to Information Security.
  • Support email filtering and investigate suspicious emails such as phishing emails.
  • Develop and tune up event correlation rules.


  • 5 years exp plus BS in IT field or 7 years exp
  • Cisco Firewall administration and log analysis
  • Cisco Router/Switch administration and log analysis
  • Troubleshooting network issues (LAN) to/from provider (WAN)
  • CCNA certification



  • CCNP certification
  • IDP log analysis

Other Desired Skills:

  • Ability to work in a fast-paced, technically challenging, and dynamic environment
  • Ability to apply analytical skills, problem solving, and attention to detail
  • Ability to work on complex projects with general direction and minimal guidance
  • Strong Oral Communications
  • Configuration Management
  • Change Management



Our values are simple and straightforward. We know that competitive salaries and generous benefits are essential in our industry and SC3 strives to offer the best in both areas. 

 We are proud to offer:

  • Medical/Dental/Vision Insurance
  • 401(k) Plan
  • Supplemental Life & AD&D 
  • Short & Long-Term Disability Insurance 
  • Flexible Spending Plan 
  • Paid Time Off 
  • Paid Holidays 
  • Professional Development 
  • Employee Referral Bonus 
  • Identity Protection Services


We are proud to be an EEO/AA employer M/F/D/V. We maintain a drug-free workplace and perform pre-employment substance abuse testing as required by the customer.


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