Senior System Engineer

Overview

TISTA Science and Technology is seeking a Senior Systems Engineer to join our growing team.

At TISTA, you’ll do meaningful, mission ‑ driven work that improves lives alongside teammates you trust and leaders who are transparent and supportive. We invest in your learning and internal mobility so you can build a career that keeps advancing. We’re proud to serve and hire Veterans, and we put people first in everything we do.

TISTA associates enjoy above Industry Healthcare Benefits, Remote Working Options, Paid Time Off, Training/Certification opportunities, Healthcare Savings Account & Flexible Savings Account, Paid Life Insurance, Short-term & Long-term Disability, 401K Match, Professional development reimbursement, Employee Assistance Program, Paid Holidays, Military Leave, and much more!

Responsibilities

• Analyze application dependencies, third-party libraries, Windows-specific components, and compatibility issues prior to containerization.

• Convert traditional IIS-hosted .NET applications into Linux-compatible containerized workloads running on OpenShift/Kubernetes.

• Develop and optimize multi-stage Dockerfiles for .NET application builds, reducing image size and improving deployment speed.

• Migrate .NET Framework applications to .NET 6/7/8 to support cross-platform container execution.

• Configure Kestrel, reverse proxies, and ingress routing for containerized ASP.NET Core applications.

• Integrate NuGet package restoration, MSBuild/dotnet CLI automation, and artifact versioning into Tekton/Argo CD pipelines.

• Upgrade outdated NuGet dependencies to address security vulnerabilities and compliance requirements.

• Ensure secure authentication integration (OAuth, SAML, JWT, Azure AD) after migration.

Qualifications

• Must have experience Utilize programming languages like .Net, Java, Python, SQL, and Ruby, C, C#.Net, VB.NET, C++, SQL, PL/SQL, T-SQL.

• Ability to Develop processes, scripts, and code to support the CI/CD pipeline.

• Experience with automation and developing opportunities to build consistency and quality.

• Proven track record of decomposing monoliths into microservices specifically within the .NET ecosystem.

• Expert-level proficiency with Kubernetes (designing clusters, managing namespaces, ingress controllers, and resource optimization).

• Deep knowledge of.NET (C#) and the transition from .NET Framework to .NET Core/6+.

• Experience with containerization (Docker, Podman, OpenShift, Kubernetes) and registry management.

• Strong expertise in Red Hat OpenShift, Kubernetes, Docker, Podman Helm Argo CD, Tekton Pipelines, Ansible

• Experience migrating enterprise applications (.NET, Java, PHP) to containers.

• Strong knowledge of AWS and Azure cloud platforms.

• Hands-on experience with CI/CD automation and GitOps workflows.

• Proficiency in Linux administration and shell scripting.

• Experience with monitoring tools such as Dynatrace and Splunk.

Education:

• Master’s degree in computer science, electronics engineering or related technical discipline and 10+ years’ work experience.

• Ten (10) years of additional relevant experience may be substituted for education (20 years total).

Clearance:

• The ability to pass a Tier 2/Moderate Background Investigation.

Location:

• Department of Veteran's Affairs (100% On-site)

• Monday - Friday (8:00 AM - 4:30 PM CST Time)

• Austin Information Technology Center (AITC)

• 1615 Woodward Street,

• Austin, TX 78741