
Sr. F5 Application Delivery Engineer
General Dynamics Information Technology
Bethesda, MD · HybridJob$124–155K/yrSeen todaySeen in employer's feed today
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Job overview
The Senior Application Delivery Engineer configures, deploys, monitors, and manages security appliances and infrastructure supporting customer application delivery in a 24x7x365 environment. The role troubleshoots and remediates enterprise issues, coordinates with other teams, and supports F5 load balancing across development, test, pre-production, and production environments. It is onsite three days per week in Bethesda, with primarily local travel in the DC metro area.
Skills & qualifications
Skills
Qualifications
Benefits
Full job description
Req ID: RQ231911
Type of Requisition: Regular
Clearance Level Must Be Able to Obtain: None
Public Trust/Other Required: NACI (T1)
Job Family: Cyber and IT Risk Management
Skills:
Application Delivery,F5 BIG-IP,F5 Load Balancer,F5 LTM
Certifications:
F5 Certified Technology Specialist (F5-CTS) | F5 - F5
Experience:
7 + years of related experience
Job Description:
The Senior Application Delivery 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 the customer’s Application Delivery infrastructure. 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 3 days a week onsite at 6555 Rock Spring Drive, Bethesda, MD travel is primarily local in the DC metro area.
Responsibilities:
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Serve as Senior Engineer / Administrator of F5 BIG-IP LTM/GTM load balancing.
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Perform F5 configuration and troubleshooting with database and application teams for over 5,000 applications that are load balanced in the Development, Test, Pre-Production, and Production environments.
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Work closely with other IT functional teams to ensure cohesive support and strategies across the IT organization
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Implement configuration changes, manage patching and support firmware lifecycle management
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Respond to incidents and outages, leading major incident bridge calls during production outages
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Conduct root cause analyses (RCA) for critical incidents
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Support security and compliance reviews and ensure all security vulnerabilities are identified and remediated.
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Monitor F5 platform health, review performance metrics and ensure failover readiness
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Review alerts and logs
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Maintain relationships with key Third-Party software/hardware vendors to provide support to the infrastructure as needed.
Required Skills:
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BS degree in Computer Science, Information Systems or equivalent
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Minimum 7 years of experience in an Application Delivery role
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Minimum 7 years of experience in a Network Engineering, or Infrastructure Engineering role
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Experience with network infrastructure in enterprise datacenter solutions
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Must have F5 Certified Technology Specialist (F5-CTS) Certification
Desired Skills:
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F5 Certified Solutions Expert (F5-CSE) certification
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CCNP Enterprise or CCNP Security certifications
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AWS, Azure or Google Cloud certifications
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Cisco SISE certification
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Experience configuring 802.1X.
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Experience configuring and implementing network segmentation including VLANs and MPLS.
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Experience with multiple end-system operating systems including Windows, Linux, Mac OS, and Apple IOS
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Experience automating infrastructure using APIs, Ansible, Terraform, or similar tools
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Experience with Forescout security products
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Experience with Cisco wireless LAN controllers.
The likely salary range for this position is $124,093 - $155,250. 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.
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 https://gdit.com/tc.
Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans
How this job compares
Set against the 4,276 open Network Engineer jobs on Olive Jobs, counted November 13, 2026.
- Pay
- This posting$124–155K/yr
- Maryland median$111–195K/yr169 salary ranges
- US median$113–187K/yr3,413 salary ranges
This range's midpoint, $140K, is 8% below the Maryland median midpoint ($153K) — in the middle half of Network Engineer salary ranges in Maryland.
- Openings
- Olive Jobs lists 211 open Network Engineer jobs in Maryland and 4,276 across the US. 6% of them nationwide are listed as remote or flexible.
- Hiring the most in Maryland
- Booz Allen Hamilton15 open
- Leidos14 open
- BOOZ, ALLEN & HAMILTON, INC.13 open
- Experience
- This posting asks for at least 7 years of experience; Network Engineer postings that state a minimum ask for 5 years at the median (3,631 postings).
- Education
- 1,122 of the 4,276 open Network Engineer jobs (26%) ask for a bachelor's degree or higher.
Counted across the open, public US postings on Olive Jobs on November 13, 2026. Figures based on too few postings are left out.
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