A Network Security Pre-Sales Engineer works closely with customers and sales teams to understand security requirements and design tailored network security solutions. They demonstrate product capabilities, deliver technical presentations, respond to RFPs/RFIs, and ensure the proposed solutions align with both technical needs and business objectives.
Responsibilities
Engage with customers to understand their network security requirements
Design and propose tailored Infoblox DDI solutions that address customer needs
Deliver Infoblox technical presentations, product demos, and proof-of-concepts (POCs)
Respond to RFPs/RFIs with accurate and compelling technical input
Work closely with sales teams to develop winning strategies and solution positioning
Requirements
Bachelor’s degree in Engineering, Computer Science, Information Technology, or related field
Solaris/LINUX System Administrator responsible for maintaining and administering Oracle on Solaris and Linux, managing Apache, network hardware, and providing technical support for Solaris-based services.
Locations (2)
Fort Belvoir, Virginia, United States
United States
Compensation
$124,301.00
Median Salary Rate
$134,017.50
Responsibilities
Maintaining and administering Oracle on Solaris and Linux
Administer and setup Apache
Work with multi-tiered clustered environments
Serve as lead specialist on Solaris issues and provide team coordination
Provide technical and infrastructure support services for Solaris OS based servers and systems
Lead Linux Administrator responsible for enterprise Linux administration, RHEL patching, vulnerability remediation, and related infrastructure services for federal government contracts.
Compensation
Target salary range: $120,000 - $170,000.
Responsibilities
Administer and maintain enterprise Linux environments
Support server deployment, configuration, patching, and upgrades
Perform system hardening and vulnerability remediation
Monitor system availability, performance, and capacity
F5 Consultant is an innovative engineer working in partnership with clients, advising them on F5 ADC solutions, providing strategic guidance and subject matter expertise for implementation and configuration of core F5 BIG-IP products.
Responsibilities
Provides technical guidance to customers onsite and/or remotely regarding implementation, configuration and maintenance of F5 BIG-IP core products independently or with a team
Performs as project lead and/or key contributor for problem identification, systems architecture definition, solution design, implementation, testing, client training, deployment, troubleshooting and documentation
Performs basic project management activities including interaction with company and client managers, cost/schedule monitoring, project status update reports, and expectation management for the delivery of work products and associated risks
Manages customer interaction and engagement over the course of the assigned projects
Maintains working proficiency in F5 products and technologies through self-directed and formal training
Senior technical engineer supporting enterprise load balancing and DNS, leading design, deployment, optimization, and troubleshooting of highly available infrastructure solutions with F5 and Citrix NetScaler technologies.
Compensation
$128,000.00 - $216,000.00
Responsibilities
Design, deploy, and maintain a critical local and global load balancing infrastructure using Citrix NetScaler and F5 solutions.
Manage DNS infrastructure and configurations
Design and implement load balanced application configurations
Provide technical leadership and design guidance for application teams.
Troubleshoot complex infrastructure issues and drive problems through resolution
Requirements
Bachelor’s degree in computer science, engineering, information technology, business, or a related field
Nice to have: multi-factor authentication solutions
Nice to have: supporting large-scale infrastructure migrations or modernization initiatives
Nice to have: F5 certifications such as F5-CTS or F5-CSE
Lead the design, deployment, optimization, and troubleshooting of highly available load balancing and DNS infrastructure using F5 and Citrix NetScaler technologies.
Locations (8)
Greenwood Village, Colorado, United States
Colorado, United States
Hawaii, United States
Illinois, United States
Nevada, United States
Network Infrastructure Engineer, DNS & Proxy
Government of Singapore – Public Service (Careers@Gov) · Posted Nov 2, 2026
Network Infrastructure Engineer responsible for operating and improving production DNS, DNSSEC, protective DNS and secure web proxy services, including troubleshooting, incident response, automation, and integration with security and identity platforms.
Responsibilities
Operate and continuously improve production DNS, DNSSEC, protective DNS and secure web proxy services
Engineer DNS zones, records, delegations, forwarding, caching, split‑horizon DNS, access controls, DNSSEC signing and proxy policies
Build and maintain automation scripts, playbooks, pipelines and reusable modules using Python, PowerShell, Ansible, Terraform, REST APIs or equivalent tools
Codify infrastructure, configurations and policies using Infrastructure as Code, configuration‑as‑code, Git and CI/CD workflows
Salary Range
$127,500.00 - $204,000.00
These pay ranges apply to employees in Colorado, Hawaii, Illinois, Nevada, Rhode Island, Vermont and Washington. Pay ranges for employees in other states may differ.
For incentive eligible associates, the successful candidate is eligible for an annual incentive opportunity which may be delivered as a mix of cash bonus and equity awards in the Company’s sole discretion.
Responsibilities
Design, deploy, and maintain a critical local and global load balancing infrastructure using Citrix NetScaler and F5 solutions.
Manage DNS infrastructure and configurations
Design and implement load balanced application configurations
Provide technical leadership and design guidance for application teams.
Troubleshoot complex infrastructure issues and drive problems through resolution
Requirements
Bachelor’s degree in computer science, engineering, information technology, business, or a related field, or an equivalent combination of education, related experience, and/or military experience
Nice to have: multi-factor authentication solutions
Nice to have: supporting large-scale infrastructure migrations or modernization initiatives
Nice to have: F5 certifications such as F5-CTS or F5-CSE
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Network Infrastructure Engineer, DNS & ProxyGovernment of Singapore – Public Service (Careers@Gov) · Singapore