Cybersecurity

Cloud security architecture, layered so one gap isn't a breach.

PHI in the cloud needs more than a firewall. We design defense in depth — identity, network, compute, application and data controls that overlap — into HIPAA-eligible AWS, Azure and Google Cloud environments.

The model

Defense in depth, from the edge to the data

No single control should be load-bearing. We design overlapping layers so an attacker who gets through one still faces the next — with identity and monitoring wrapping every layer.

Perimeter & edge

The outer boundary that filters what even reaches you.

WAFDDoS protectionCDNAPI gateway

Network

Segmentation and private paths so lateral movement is contained.

VPC segmentationFirewallsPrivate subnetsZero-trust networking

Compute & host

Hardened, patched and monitored workloads.

Hardened imagesPatch managementEDRLeast-privilege roles

Application

Security built into how the software itself is made.

Secure SDLCSecrets managementInput validationDependency scanning

Data

The core — protected even if every other layer fails.

Encryption at restTokenizationDLPKey management
Why AST

Cloud security from people who build on the cloud

Architecture designed by engineers who run production healthcare workloads — so the controls fit how systems really operate, not a checklist.

17+
years securing healthcare systems

We secure the cloud the way we build on it — from the architecture out, not bolted on after.

3
clouds we design for

HIPAA-eligible AWS, Azure and Google Cloud — under a BAA, configured for PHI.

5
overlapping defense layers

Perimeter, network, compute, application and data — with identity and monitoring across all of them.

IaC
controls as code

Security lives in infrastructure-as-code, so it's reviewable, repeatable and doesn't drift.

The engagement

How we secure your cloud

From a clear-eyed posture review to a hardened, validated, defense-in- depth environment expressed in code — we own the architecture and the build.

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Engineering a secure cloud environment
01Security architecture review

We assess your current cloud posture against how an attacker would actually approach it — and surface the misconfigurations that turn into incidents.

  • Configuration review
  • Identity & access audit
  • Network & exposure map
  • Findings & priorities
02Defense-in-depth design

We design the overlapping layers — identity, network, compute, application and data — so no single control is the only thing standing between an attacker and PHI.

  • Layered control design
  • Zero-trust model
  • Segmentation plan
  • Encryption & key design
03Implementation as code

We build the controls into your environment in infrastructure-as-code — so the security posture is version-controlled and survives every deploy.

  • Terraform / IaC
  • Guardrails & policy
  • Secrets & key management
  • CI/CD security gates
04Hardening & validation

We harden the environment against real attack paths and validate it — pen-test-informed, not assumption-based — before it carries production PHI.

  • Benchmark hardening
  • Attack-path testing
  • Drift detection
  • Continuous validation
What we put in place

The controls behind a defensible cloud

Identity & access

The control plane attackers target first — locked down and least-privilege.

  • IAM design
  • MFA & SSO
  • RBAC & JIT access
  • Federation

Network security

Segmentation and zero-trust paths that contain any single compromise.

  • VPC architecture
  • Segmentation
  • Firewalls
  • Private connectivity

Data protection

PHI encrypted, tokenized and watched wherever it lives.

  • Encryption at rest
  • Key management
  • Tokenization
  • DLP

Workload security

Hardened, patched, monitored compute across the estate.

  • Hardened baselines
  • Patch automation
  • EDR
  • Container security

Monitoring & detection

You see an incident early — and the evidence is already there.

  • Logging & SIEM
  • Threat detection
  • Alerting
  • Runbooks

Secure DevOps

Security shifted left, into the pipeline that ships your code.

  • CI/CD gates
  • IaC scanning
  • Dependency checks
  • Policy as code
Who it's for

Wherever your cloud is on its journey

Migrating PHI in, outgrowing an early setup, or cleaning up after a review found gaps — the fix is architectural, and that's what we do.

Cloud infrastructure

Migrating PHI to AWS, Azure or GCP

Lifting healthcare workloads into the cloud changes the threat model entirely. We design the security architecture before the migration, so PHI lands in an environment that's safe from day one.

  • HIPAA-eligible design
  • Migration security
  • Landing zone
  • BAA-ready config

Outgrowing an early setup

The architecture that got you to launch rarely survives scale. We harden and re-architect a growing cloud footprint before a misconfiguration becomes the breach.

  • Posture hardening
  • Re-architecture
  • Cost-aware controls
  • Guardrails at scale

A pen test or audit found gaps

A security review or customer assessment came back with findings. We fix the root causes in the architecture, not just the symptoms on the report — so the next review is clean.

  • Root-cause fixes
  • Remediation design
  • Re-test support
  • Lasting posture
The difference

Bolted-on tools or security by design

Most cloud breaches aren't exotic — they're a gap between tools that were never designed to work as one system. Architecture is the fix.

The common way
Bolted-on security
Added after the architecture sets

Controls retrofitted onto an environment that wasn't designed for them — leaving the gaps between tools that attackers live in, and a posture nobody fully understands.

  • Gaps between tools
  • Hard to reason about
  • Drifts over time
  • Single points of failure
With AST
Secure by design
Layered in from the architecture

Overlapping controls designed into the environment from the start, expressed in code, so the security posture is coherent, reviewable and holds up as the system grows.

  • Defense in depth
  • Coherent by design
  • Expressed as code
  • No load-bearing single control
How we deliver

From assessment to a monitored, hardened cloud

01
Assess

Current posture, exposure and attack paths.

02
Design

The layered, zero-trust target architecture.

03
Build

Controls implemented in infrastructure-as-code.

04
Harden

Benchmark hardening against real attack paths.

05
Validate

Test the design holds before production PHI.

06
Monitor

Detection and drift control, ongoing.

How we engineer

Security principles we build by

The convictions behind every cloud we harden — the difference between a posture that holds and a stack of tools that hopes.

Secure infrastructure

Defense in depth

No single control is load-bearing. Layers overlap so one failure isn't a breach.

Zero trust

Nothing is trusted by location. Every request is authenticated, authorized and logged.

Least privilege

Identities get the minimum they need, for the least time they need it.

Encrypt everything

PHI is encrypted in transit and at rest, with keys you control and rotate.

Security as code

Controls live in infrastructure-as-code — version-controlled, reviewable and drift-resistant.

Assume breach

We design so a compromise is detected fast and contained, not discovered months later.

Questions

Cloud security architecture FAQ

Which clouds do you work in?

AWS, Microsoft Azure and Google Cloud, using their HIPAA-eligible services under a signed BAA. We design to each provider's well-architected and security frameworks rather than a generic template.

Isn't the cloud secure already?

The cloud operates on a shared-responsibility model: the provider secures the infrastructure, but you're responsible for everything you put on it — identity, network, data and configuration. Most breaches are misconfigurations on the customer side, which is exactly what we architect away.

Do you implement, or just advise?

Both. We design the architecture and build the controls in infrastructure-as-code with your team, so the posture is real and repeatable rather than a diagram in a slide deck.

Can you work across multiple clouds?

Yes. We design consistent identity, network, data and monitoring patterns across multi-cloud estates so security doesn't fragment as you spread across providers.

How does this relate to penetration testing?

We design and build the secure architecture; penetration testing validates it by trying to break in. They're complementary — and we offer both, so design and validation reinforce each other.

Let's lock it down

Is your cloud one misconfiguration from a breach?

Tell us what you run and where. We'll map the exposure and design the layered architecture that keeps a single mistake from becoming an incident.

Talk to our team
A secure operations environment