Senior Network Security Engineer
In short. Senior Network Security Engineer at General Dynamics Information Technology: a full-time senior role, on-site in Bethesda, MD. Posted salary: $119K – $161K. Asks for 4+ years of experience. Main work: Administration of LAN technologies for Cisco ASA Firewalls. Posted Nov 7, 2026, checked on the employer's site 9 min ago.
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Summary
The Senior Network Security Engineer is responsible for the configuration, deployment, and management of the customer’s security appliances and infrastructure in a 24x7x365 environment. The senior engineer is responsible for but not limited to monitoring, configuration changes, accounts, and software updates for the customer’s security appliances for internal and border security framework.
Quoted from General Dynamics Information Technology's description, not rewritten.
About the role
Type of Requisition:
Regular
Clearance Level Must Currently Possess:
None
Clearance Level Must Be Able to Obtain:
None
Public Trust/Other Required:
NACI (T1)
Job Family:
Cyber and IT Risk Management
Job Qualifications:
Skills:
Cisco Firewall, Cisco VPN, Palo Alto Networks Next Generation Firewalls (NGFW), Remote Access VPN
Certifications:
None
Experience:
4 + years of related experience
US Citizenship Required:
No
Job Description:
The Senior Network Security Engineer is responsible for the configuration, deployment, and management of the customer’s security appliances and infrastructure in a 24x7x365 environment. The senior engineer is responsible for but not limited to monitoring, configuration changes, accounts, and software updates for the customer’s security appliances for internal and border security framework. The engineer must be able to analyze, troubleshoot, and remediate issues within the enterprise. The engineer will also work closely with other teams to ensure that all security solutions are performing to standard.
This position is located at 6555 Rock Spring Drive, Bethesda, MD travel is primarily local in the DC metro area.
Responsibilities:
- Administration of LAN technologies for Cisco ASA Firewalls
- Administration of firewalls, including but not limited to Cisco ASA, ACS, RSA, Cisco AnyConnect, Gigamon, Cisco VPN, Palo Alto
- Assist in troubleshooting and problem solving for a wide variety of client/user LAN/Security related issues
- Work closely with other IT functional teams to ensure cohesive support and strategies across the IT organization
- Support the development of project plans and execute as authorized
- Maintain relationships with key Third-Party software/hardware vendors to provide support to the infrastructure as needed.
- Provide daily support for tickets: service requests, incidents, problems, and tasks
- Execute tasks to support projects
- Auditing and Compliance
- Configuration changes and Code upgrades needed to address vulnerabilities report by internal/external audits.
- Vulnerability mitigation.
- IOS code version bug scrapping with Cisco SME/TAC
- IOS code version lab testing before implementing in production
- Quarterly IOS code upgrades
- Auditing of any newly deployed firewalls to verify compliance
- 24-hours availability for weekly On-Call rotation with the security team
- Firewall hardware refreshes including rack and stack
Required Skills:
- BS degree in Computer Science, Information Systems or equivalent.
- Minimum of four years of experience implementing and maintaining Cisco ASA, VPN, ACS, AnyConnect, Gigamon
- Minimum four years of experience in a Network Security Engineering role.
- Experience with network infrastructure in enterprise datacenter solutions.
- Experience with mid to large scale implementations of Cisco firewalls.
- Ability to obtain a Public Trust
The likely salary range for this position is $119,000 - $161,000. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range.
Scheduled Weekly Hours:
40
Travel Required:
Less than 10%
Telecommuting Options:
Hybrid
Work Location:
USA MD Bethesda
Additional Work Locations:
Total Rewards at GDIT:
Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most.Our Identity Verification Process:
As part of the hiring process, we will ask you to complete an identity verification process that leverages advanced biometrics and artificial intelligence to ensure authenticity and protect against identity fraud. You are expected to be on camera during virtual interviews. We reserve the right to take your picture to verify your identity and prevent fraud. By proceeding, you authorize the collection, processing, and use of your biometric data for identity verification and security purposes.
About Our Work:
We are GDIT. A global technology and professional services company that delivers technology solutions and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50+ countries worldwide, offering leading mission-ready capabilities in AI, cloud, cyber and software development.Join our Talent Community to stay up to date on our career opportunities and events at
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