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From the employer's careers site First seen 13 Nov 2026

Senior Application Delivery Engineer

GDIT Bethesda, MD Hybrid senior full-time

Salary

$124,093 - $155,250 per year

Apply on GDIT

Description

We are seeking a Senior Application Delivery Engineer to join our team. The successful candidate will be responsible for the configuration, deployment, and management of security appliances and infrastructure in a 24x7x365 environment.

Responsibilities:

  • Serve as Senior Engineer / Administrator of F5 BIG-IP LTM/GTM load balancing.
  • 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.
  • Work closely with other IT functional teams to ensure cohesive support and strategies across the IT organization.
  • Implement configuration changes, manage patching and support firmware lifecycle management.
  • Respond to incidents and outages, leading major incident bridge calls during production outages.
  • Conduct root cause analyses (RCA) for critical incidents.
  • Support security and compliance reviews and ensure all security vulnerabilities are identified and remediated.
  • Monitor F5 platform health, review performance metrics and ensure failover readiness.
  • Review alerts and logs.
  • Maintain relationships with key Third-Party software/hardware vendors to provide support to the infrastructure as needed.

Requirements:

  • BS degree in Computer Science, Information Systems or equivalent.
  • Minimum 7 years of experience in an Application Delivery role.
  • Minimum 7 years of experience in a Network Engineering, or Infrastructure Engineering role.
  • Experience with network infrastructure in enterprise datacenter solutions.
  • Must have F5 Certified Technology Specialist (F5-CTS) Certification.

Desired Skills:

  • F5 Certified Solutions Expert (F5-CSE) certification.
  • CCNP Enterprise or CCNP Security certifications.
  • AWS, Azure or Google Cloud certifications.
  • Cisco SISE certification.
  • Experience configuring 802.1X.
  • Experience configuring and implementing network segmentation including VLANs and MPLS.
  • Experience with multiple end-system operating systems including Windows, Linux, Mac OS, and Apple IOS.
  • Experience automating infrastructure using APIs, Ansible, Terraform, or similar tools.
  • Experience with Forescout security products.
  • Experience with Cisco wireless LAN controllers.

The likely salary range for this position is $124,093 - $155,250.

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Skills

Required

  • Application Delivery
  • F5 BIG-IP
  • F5 Load Balancer
  • F5 LTM
  • Network Engineering
  • Infrastructure Engineering

Nice to have

  • F5 Certified Solutions Expert (F5-CSE)
  • CCNP Enterprise
  • CCNP Security
  • AWS
  • Azure
  • Google Cloud
  • Cisco SISE
  • 802.1X
  • VLANs
  • MPLS
  • Ansible
  • Terraform
  • Forescout
  • Cisco wireless LAN controllers

Ready to apply?

You apply with the employer directly. Their original posting is here: https://gdit.wd5.myworkdayjobs.com/en-US/External_Career_Site/job/USA-MD-Bethesda/Sr-F5-Application-Delivery-Engineer_RQ231911-1

Apply on GDIT