Modernize Legacy
Without Breaking the Business.

Move beyond risky “big bang” migrations. We deliver incremental legacy modernization with secure cloud landing zones, DevSecOps automation, and observability-first operations—so Day 2 is stable, not chaotic.

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Discovery & Audit

Cloud Landing Zone

DevSecOps Guardrails

Modernization Trusted for Regulated & Mission-Critical Systems

35%
OpEx Reduction

Rationalize infra + automate releases.

4-8w
Migration Wave

Iterative moves—no big bang.

100%
Policy as Code

Guardrails baked into pipelines.

$0.
Platform Lock-In

Portable patterns + open tooling.

Beyond the Lift-and-Shift.
Modernize for Day 2.

Most migrations fail after go-live due to missing landing zones, weak security controls, and no observability. We modernize with a stable platform foundation—so operations don’t collapse.

The Legacy Migration Failure Pattern

What most “move teams” deliver:

  • No Landing Zone

    Identity, network, logging, and guardrails are bolted on too late.

  • Fragile Cutovers

    No rehearsal, no rollback plan, and high downtime risk.

  • Zero Day-2 Ops

    No SLOs, no dashboards, no runbooks—only tickets.

The Coretus Modernization Standard

Production-grade transformation:

  • Landing Zone + Identity First

    Network segmentation, IAM, logging, and baseline policies before workloads move.

  • Modern Cutover Engineering

    Wave planning, rehearsals, rollback, and validation gates to minimize risk.

  • DevSecOps + Observability

    Pipelines, scanners, SLO dashboards, and runbooks for stable Day 2 operations.

Stable Platforms. Predictable Operations.

Modernization Capabilities.

Move from Legacy Constraints to Cloud Velocity + Control.

Discovery + Rationalization

Application inventory, dependency mapping, risk scoring, and modernization pathways per workload.

  • App Portfolio Map
  • Wave Planning

Landing Zone Engineering

Identity, networking, logging, and policy baselines for secure, scalable cloud foundations.

  • IAM + Network Segmentation
  • Centralized Logging

Migration + Cutover

Rehost, replatform, or refactor with rehearsals, rollback, and validation gates.

  • Blue/Green Cutovers
  • Rollback Playbooks

DevSecOps Automation

CI/CD pipelines, scanners, policy-as-code, and reproducible infrastructure via IaC.

  • IaC + Pipelines
  • Security Gates

Data Modernization

Database migration, replication, performance tuning, and modernization for cloud primitives.

  • Replication Strategy
  • Performance Tuning

Observability + SRE

Dashboards, tracing, SLOs, and runbooks so Day 2 operations stay stable and measurable.

  • SLO Dashboards
  • Runbooks + Alerts
/// Modernization Stack

A Hardened Path from
Legacy to Cloud.

Discovery + Dependency Map

Modernization Plan

Application portfolio rationalization, risk scoring, and wave planning tied to business criticality.

Dependency Graph
Wave Sequencing
Risk + RTO/RPO
InventoryPlanWaves

Landing Zone + Network

Foundation First

Identity, segmentation, logging, and baseline controls so workloads land on solid ground.

IAM Baselines
Network Segmentation
Central Logging
VPC/VNetIAMLogs

Cutover + Validation

Risk Control

Rehearsed cutovers with rollback plans and validation gates so production moves safely.

Rehearsal Runs
Rollback Strategy
Acceptance Gates
CutoverTestsRollback

Observability + SRE

Day 2 Ready

SLO dashboards, tracing, alerts, and runbooks so the cloud platform stays measurable and stable.

SLO Dashboards
Tracing + Logs
Runbooks + Alerts
MetricsTracingSLOs
/// Modernization Accelerator

Modernize Faster.
Avoid Migration Chaos.

We deploy the Coretus Migration Kernel™—a pre-hardened foundation for landing zones, CI/CD, security gates, and observability.

Your teams focus on business validation and platform reliability, not rebuilding foundations.

6-10 Wk

Time-to-Platform Saved

30-50%

Release Cycle Faster

Built for auditability, policy enforcement, and Day 2 operations.
Cutover-Ready

Your Legacy Reality

Dependencies • Risk • Downtime • Compliance

Coretus Migration Kernel v2.4

Discovery

  • • Map
  • • Risk

Landing Zone

  • • IAM
  • • Net

Cutover

  • • Rehearse
  • • Rollback

SRE Ops

  • • SLO
  • • Runbooks
/// Pre-Configured Modernization Pods

Deploy Migration-Ready Delivery Squads.

Integrated units specialized in legacy analysis, cloud foundations, and DevSecOps operations—so you modernize safely, not repeatedly firefight.

Modernization Architect

Builds the transformation plan: dependencies, wave sequencing, data flows, and cutover strategy.

PortfolioWavesCutover

DevSecOps Lead

Embeds policy-as-code, scanners, and deployment guardrails across environments.

PipelinesPolicyGates
99.9%
Availability Target
Cutover Rehearsals Included

Squads arrive with landing zone patterns, rollout playbooks, and observability hooks—built-in from day one.

Cloud Platform Engineer

Builds landing zones, networks, IAM baselines, and reproducible infrastructure.

Landing ZoneIaCNetwork

SRE / Observability Lead

SLO dashboards, tracing, alerts, and runbooks to keep Day 2 operations stable.

SLOsTracingRunbooks
/// Architectural Integrity

The Modernization Blueprint.

Transformations are a system: assess, foundation, migrate, secure, and operate—engineered for stability and compliance.

01. Discovery

Inventory, dependencies, risk, and wave sequencing to de-risk the transformation.

Focus:
Portfolio • Dependency Map • RTO/RPO

02. Foundation

Landing zones, networking, identity, and logging to enforce stable baselines.

Focus:
IAM • Network • Central Logs

03. Migration Waves

Cutover engineering with validation, rehearsals, and rollbacks for safe moves.

Focus:
Rehearsals • Blue/Green • Rollback
Wave-Based

04. Operate + Improve

Observability, SLOs, runbooks, and security gates for predictable operations.

Focus:
SLOs • Tracing • Runbooks
Secure by Design
Landing Zones
Observable Ops
/// Delivery Framework

The Road to Safe Modernization.

A phased model that reduces downtime risk: discovery, foundation, migration waves, then Day 2 ops.

Phase 01

Discovery + Risk Model

Portfolio mapping, dependencies, RTO/RPO, and modernization pathway per workload.

Output: Modernization Plan
Phase 02

Landing Zone + Baselines

Identity, networking, logging, and policy baselines so workloads land safely.

Output: Cloud Foundation Ready
Phase 03

Migration Waves + Cutovers

Wave execution with rehearsals, validation gates, and rollback plans.

Output: Safe Production Moves
Phase 04

Operate + Optimize

SLO dashboards, alerts, runbooks, and continuous security controls for Day 2 stability.

Output: Measurable Cloud Ops
/// Performance Validation

Proven Modernization Outcomes.

Cloud Case Archives
48%
Release Faster

Legacy App Modernized
with DevSecOps

Manual releases caused downtime risk and drift across environments.

Delivered a landing zone + CI/CD with policy gates + baseline observability.

"We finally had predictable releases—guardrails made it safe, and dashboards made it operable."

PE
Platform Engineering
Enterprise Team
32%
Cost Reduced

Migration Waves for
Legacy Infrastructure

Legacy infra growth created cost spikes and scaling bottlenecks.

Shipped wave-based migration with rehearsed cutovers and Day 2 observability.

"Cutovers stopped being scary—rehearsals + rollback made it controlled and repeatable."

IT
Infrastructure Lead
Ops Organization
/// Delivery Models

Modernization Partnership Models.

Choose an engagement aligned with speed, risk tolerance, and platform ownership.

Fast Waves

Managed Modernization Squads

Embedded team for landing zones, migration waves, and DevSecOps stability.

Velocity & Reliability
SQUAD SPECS
Strategic Advisory

Fractional Cloud CTO

Define modernization waves, platform guardrails, and Day 2 operating models.

Strategy & Architecture
EXPLORE ADVISORY
Build-Operate-Transfer

Build-Operate-Transfer

We modernize and operate your platform in production, then transfer to your teams with runbooks.

Platform Ownership
VIEW BOT MODEL
Scale Delivery

Modernization ODC

Your dedicated cloud modernization center for continuous waves, refactors, and platform ops.

Operational Scale
EXPLORE ODC
/// Trust & Controls

Governed
Cloud Operations.

Modernization must balance speed with risk control. We embed policy enforcement, auditability, and observable pipelines—so production stays trustworthy.

Validation Gates + Rollback

Rehearsals, acceptance checks, and rollback playbooks for controlled cutovers.

Policy as Code

Guardrails in pipelines: security scans, compliance checks, and drift prevention.

Audit Trails + Observability

Logs, traces, and dashboards mapped to SLOs—so Day 2 is measurable.

Audit Logs

Traceable Changes

Policy

Guardrails

SLOs

Reliability

Cutovers

Rollback Ready

/// Migration Briefing

See the Modernization Stack.

A 100-second breakdown of discovery, landing zones, cutover engineering, and Day 2 operations.

Coretus Legacy-to-Cloud Transformation Briefing
Platform Lead
Principal Engineer
Cloud Modernization Lead
01:40 • MIGRATION MODE

Discovery

Dependencies + risk model + wave plan.

Foundation

Landing zones + identity + networking.

Day 2 Ops

SLOs + tracing + runbooks + guardrails.

/// Modernization FAQs

Frequently Asked
Migration Specs.

Service Identity
Legacy-to-Cloud Transformation

Can you avoid big-bang cutovers?

Yes. We use wave-based modernization and rehearsed cutovers with rollback to reduce downtime risk.

Landing zone included?

Yes. Identity, networking, logging, and baseline policies are built first so workloads land safely.

Security & compliance guardrails?

We embed policy-as-code, scanners, and audit trails into pipelines and platform baselines.

Rehost vs refactor guidance?

We recommend per workload: rehost, replatform, refactor, or rebuild—based on risk and ROI.

Day 2 operations covered?

SLO dashboards, alerts, tracing, and runbooks are included so the platform stays operable.

Modernization Feasibility?

We can deliver a 48-hour assessment: dependencies, risk scoring, and a wave plan for your top workloads.

Request Migration Briefing

Modernize Your Legacy Core.

Stop patching brittle systems. We transform legacy applications and infrastructure into cloud-native, observable, and security-hardened platforms—without interrupting revenue workflows.

Zero-Downtime Cutovers

DevSecOps Built-In

Architecture + IP Ownership

Request Migration BriefingRequest Migration Briefing