IT Application Engineer

Vantor Holdings • Westminster, CO

1d • Onsite

About The Position

Vantor is seeking an experienced IT Application Support Engineer to design, implement, secure, and support enterprise application infrastructure across on-premises and cloud environments. This role focuses on application delivery, Layer 7 networking, cloud platforms, and systems engineering to ensure the availability, performance, scalability, and security of mission-critical business applications. The successful candidate will have strong experience with application load balancing, Web Application Firewalls (WAF), cloud networking, server administration, and infrastructure automation. This position works closely with software development, cybersecurity, networking, and operations teams to deliver resilient and highly available application services.

Requirements

• Bachelor's degree in Information Technology , Computer Science, Engineering, or equivalent experience.
• 5+ years of experience supporting enterprise applications, infrastructure engineering, systems administration, or application delivery platforms.
• Experience administering Layer 7 networking and application delivery technologies.
• Hands-on experience with load balancing and Web Application Firewall (WAF) solutions, including F5 BIG-IP LTM/ASM, AWS ALB/NLB, Azure Application Gateway, or equivalent platforms.
• Experience supporting Windows and Linux operating systems.
• Experience with AWS, Azure, or other cloud platforms.
• Strong understanding of TCP/IP, DNS, HTTP/S, SSL/TLS, routing, firewalls, reverse proxies, and application networking concepts.
• Experience with virtualization, hybrid cloud architectures, and infrastructure automation.
• Proficiency with scripting or automation tools such as PowerShell, Python, Bash, Terraform, or Ansible.
• Strong analytical, troubleshooting, communication, and problem-solving skills.
• Must be a U.S. Person, defined as a U.S. citizen, permanent resident, Asylee, or Refugee.

Nice To Haves

• AWS Certified Solutions Architect or SysOps Administrator
• Microsoft Azure Administrator or Solutions Architect
• F5 Certified Administrator (F5-CA)
• Cisco CCNA/CCNP
• VMware VCP
• CompTIA Security+ or equivalent security certification
• Experience with Docker, Kubernetes, OpenShift, or other container platforms
• Familiarity with CI/CD pipelines, DevOps practices, and modern application architectures
• Experience with observability, monitoring, and SIEM platforms
• Knowledge of Zero Trust principles and cybersecurity frameworks

Responsibilities

• Design, deploy, and support highly available application delivery platforms and supporting infrastructure.
• Configure and manage Layer 7 technologies including load balancers, reverse proxies, SSL/TLS services, traffic management policies, and Web Application Firewalls (WAF).
• Support and administer technologies such as F5 BIG-IP LTM/ASM, AWS ALB/NLB, Azure Application Gateway, NGINX, HAProxy , Citrix ADC, or equivalent solutions.
• Troubleshoot application performance, connectivity, authentication, API, and availability issues.
• Develop and maintain high-availability, failover, and application resiliency solutions.
• Partner with development and cybersecurity teams to support application deployments and secure application architectures.
• Administer Windows and Linux server environments across physical, virtual, hybrid, and cloud platforms.
• Support AWS, Azure, and other cloud environments, including networking, security, monitoring, and identity management services.
• Manage virtualization platforms and infrastructure services supporting enterprise applications.
• Implement Infrastructure as Code ( IaC ) and automation solutions using tools such as Terraform, Ansible, PowerShell, or Python.
• Monitor system health, performance, and capacity to ensure reliable service delivery.
• Implement and maintain security controls aligned with organizational and regulatory requirements.
• Support vulnerability remediation, system hardening, application security, and incident response efforts.
• Assist with audits, compliance initiatives, and continuous improvement of security posture.
• Maintain application and infrastructure observability through monitoring, logging, and alerting platforms.
• Provide Tier 2 and Tier 3 support for application and infrastructure-related incidents.
• Participate in on-call rotations and critical incident response activities.
• Collaborate with engineering, operations, cybersecurity, and business stakeholders on strategic initiatives.
• Maintain technical documentation, architecture diagrams, and operational procedures.
• Contribute to process improvements, technology evaluations, and mentoring of junior team members.

Benefits

• Robust 401(k) with company match
• Mental health resources
• Student loan repayment assistance
• Adoption reimbursement
• Pet insurance
• Incentive eligible with a target based on contribution, company performance, and/or individual results achieved

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: Associate degree