Modernize Mission-Critical Systems for Defense & Aerospace
As an SDVOSB firm, we specialize in migrating legacy .NET applications from on-premise servers at Redstone and local primes to secure, compliant cloud environments.
Legacy Sustainment Systems Are Becoming an Operational Liability.
Your mission-critical applications, built on aging .NET Framework and hosted on-premise, are difficult to maintain and secure. These monolithic systems hinder rapid deployment cycles required by modern defense programs. Finding engineers fluent in decade-old frameworks is a constant struggle, while patching for new vulnerabilities becomes a high-risk, all-hands evolution. The hardware they run on is a single point of failure, and the path to achieving CMMC 2.0 compliance on-prem is complex and expensive. This isn't just technical debt; it's a direct risk to program delivery.
- End-of-life .NET Framework versions create immediate security risks.
- On-premise server maintenance drains budget from core mission objectives.
- Monolithic architectures prevent incremental feature delivery and testing.
- Inability to scale compute resources for analysis or simulation workloads.
A Phased, Low-Disruption Migration to a Secure Cloud Platform.
- STEP-01
Baseline System & Dependency Audit
We inventory every component of the legacy application, from database connections to third-party libraries. This initial reconnaissance mission identifies all dependencies and potential migration blockers before we write a single line of code.
- STEP-02
Establish Secure Cloud Landing Zone
We deploy a secure, compliant baseline in AWS GovCloud or Azure Government. This includes network controls, IAM policies, and logging configured to meet CUI handling requirements from day one.
- STEP-03
Implement Strangler-Fig Facade
We stand up a reverse proxy that routes traffic. Initially, all requests pass through to the legacy system. This facade becomes the entry point for incrementally migrating services without a 'big bang' cutover.
- STEP-04
Incrementally Migrate and Rebuild Services
We peel off discrete services, rebuilding them as modern .NET microservices or serverless functions in the cloud. As each new service goes live, we update the facade to route traffic accordingly, slowly strangling the old monolith.
- STEP-05
Decommission Legacy On-Premise Hardware
Once all functionality is migrated and validated in the cloud environment, the final step is to formally decommission the original on-premise servers, eliminating the associated maintenance and security overhead for good.
/*
Modern .NET 8 Minimal API endpoint for a flight telemetry service.
Replaces a legacy WCF service or ASP.NET MVC controller.
*/
using Microsoft.AspNetCore.Mvc;
public static IEndpointConventionBuilder MapTelemetryEndpoints(
this IEndpointRouteBuilder app)
{
var group = app.MapGroup("/api/telemetry").WithTags("Telemetry");
group.MapGet("/{flightId}", async (
[FromRoute] string flightId,
[FromServices] ITelemetryRepository telemetryRepo) =>
{
var data = await telemetryRepo.GetFlightDataAsync(flightId);
return data is not null ? Results.Ok(data) : Results.NotFound();
})
.WithName("GetFlightTelemetry")
.Produces<FlightData>(StatusCodes.Status200OK)
.Produces(StatusCodes.Status404NotFound);
return group;
}Example of a modern .NET 8 Minimal API endpoint. This declarative, dependency-injected approach is simpler to test, secure, and deploy in a cloud environment compared to legacy ASP.NET MVC controllers or WCF services.
Field FAQ.
→ Why not just 'lift and shift' our old application to a VM in the cloud?
A 'lift and shift' moves your problems to a more expensive location. You still have to manage the OS, patch the .NET Framework, and deal with the monolithic architecture. True modernization involves refactoring the application to leverage cloud-native services like serverless functions and managed databases. This reduces operational cost, improves security, and allows for genuine scalability instead of just running the same old code on someone else's server.
→ Our system handles CUI. How do you ensure compliance in the cloud?
We work exclusively within AWS GovCloud and Azure Government, which are designed for sensitive data and export-controlled workloads. Our process begins by establishing a secure landing zone with controls mapped to NIST 800-171 requirements. This includes encrypted data-at-rest and in-transit, strict IAM roles, comprehensive logging, and network segmentation. We build compliance into the infrastructure from the start, rather than trying to bolt it on later.
→ What does being an SDVOSB mean for contracting with you?
As a Service-Disabled Veteran-Owned Small Business (SDVOSB), we provide federal agencies and prime contractors with a streamlined procurement path. Contracting officers can use sole-source or set-aside acquisition strategies to engage us, simplifying the process. For primes, partnering with us helps meet subcontracting goals while gaining access to specialized, senior-level engineering talent without the overhead of a large systems integrator.
→ How does the 'strangler-fig' pattern reduce risk on a long-term program?
The strangler-fig pattern avoids a high-risk 'big bang' cutover. Instead of replacing the entire system at once, we incrementally peel off and replace individual pieces of functionality. This allows for continuous delivery and testing of new components while the core legacy system remains operational. It minimizes disruption to users, provides value faster, and allows the program to pivot based on feedback without jeopardizing the entire modernization effort.
→ Can you work with our existing team of government civilian or prime contractor engineers?
Absolutely. Our model is designed for collaboration. We embed our senior engineers directly with your team, operating as a unified force. We focus on knowledge transfer, establishing best practices for source control via Git, implementing CI/CD pipelines in Azure DevOps or GitHub Actions, and ensuring your internal team can sustain the modernized system long after our direct engagement ends. We build with you, not for you.
→ Our application uses a SQL Server version that's no longer supported. How do you handle that?
This is a common scenario. Our first step is to containerize the existing database to isolate it. From there, we typically plan a migration to a managed cloud database service like Azure SQL or Amazon RDS. This eliminates the need for manual patching and backups. We use schema conversion tools and data migration services to execute the transition with minimal downtime, often during a planned maintenance window.
→ What's the typical size of a VooStack modernization team?
We deploy small, focused teams of senior engineers. A typical engagement consists of 2-4 engineers, including a technical lead who serves as the primary point of contact. This lean structure avoids the communication overhead and inefficiency of large, multi-layered teams. It ensures direct access to the experts doing the work and keeps the project focused on executing the mission, not on managing layers of bureaucracy.
→ Do your engineers have security clearances?
Our engineers are all U.S. citizens and are cleared-eligible. We can readily support contracts requiring clearances up to the Top Secret level. We handle the administrative process to sponsor or transfer clearances as needed for specific Department of Defense or other federal agency contracts, ensuring our personnel meet all security requirements for the project.
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