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Independent consultant for complex technical work

For CTOs, founders, CEOs, and engineering leads who need experienced technical support on difficult work.

I help teams untangle complex platform, cloud, security, and delivery work.

I work where architecture decisions and hands-on implementation both matter — migrations, platform foundations, security and delivery, mostly for teams under real pressure.

15+ years across software, platform, and consulting.

Working on my own since 2009.

Architecture, implementation, and enablement in one engagement.

Based in Crete and working across EU time zones.

Marcel Heers, independent platform, cloud, and delivery consultant

Capability areas

Where I am most useful

Platform engineering, cloud, security and delivery: the areas I am usually brought in for.

  1. architecture

    Architecture for complex delivery

    I clarify difficult platform and system decisions so teams can move from uncertainty into an executable plan.

    • I shape pragmatic target architectures for migration-heavy or governance-heavy environments.
    • I connect technical decisions to delivery constraints, ownership boundaries and operational reality.
    • I stay hands-on where the riskiest architectural choices need proving in code.
  2. cloud

    Cloud modernization without unnecessary drama

    I help teams modernize cloud and platform foundations without turning every problem into a prolonged transformation program.

    • I design Kubernetes, infrastructure-as-code and delivery automation patterns that teams can actually maintain.
    • I support cloud and hybrid migration work where platform reliability and operational clarity both matter.
    • I improve observability, governance and platform guardrails as part of delivery.
  3. secure delivery

    Secure delivery as an operating habit

    I build secure-by-default delivery practices that reduce friction instead of adding ceremony after the fact.

    • I work on authorization, policy controls, secrets handling and supply-chain-aware delivery flows.
    • I modernize CI/CD and delivery paths so teams can ship critical changes with confidence.
    • I introduce AI-assisted engineering or policy workflows only where they are genuinely useful.
  4. data integration

    Data and integration work that stays operable

    I turn data-heavy and integration-heavy systems into something clearer, more reliable and easier to evolve.

    • I design data platform and internal-service foundations for operationally important systems.
    • I connect APIs, workflows and backend services into coherent delivery paths.
    • I balance architecture, implementation and production concerns in environments with real complexity.
  5. leadership enablement

    Technical leadership that makes teams stronger

    I bring senior technical judgment and practical enablement when teams need clearer direction and delivery support.

    • I support architecture decisions, stakeholder alignment and delivery-critical planning.
    • I mentor teams through difficult implementation phases instead of stopping at recommendations.
    • I use workshops, training and technical communication to leave stronger patterns behind.

Kubernetes, Pulumi, Terraform, Go, OPA and Rego, Dagger, Cilium, NiFi, Trino, PostgreSQL, ClickHouse. Full toolbox

Experience and leadership

Fifteen years across architecture, delivery and enablement

Since 2009, across product teams, internal platforms and large enterprises.

I have worked on platform, cloud and delivery problems since 2009, across product teams, internal platforms and large enterprise environments. Most of that work combined architecture, implementation and enablement rather than treating them as separate tracks.

  • Working independently since 2009, with hands-on delivery in every engagement.
  • Comfortable with small delivery teams and with environments serving hundreds of thousands of users.

Full career timeline

Leadership

Leadership and delivery support

  • I help teams make faster, clearer technical decisions when delivery risk is high.
  • I stay close enough to implementation to turn direction into working outcomes.

Selected projects

Selected work

A small selection of anonymized project references based on recent work.

Case study 01

Enterprise retail: a 600,000-user Microsoft-to-Google migration

Industry
Retail
Scale
enterprise
Role
T-shaped architect for enterprise migration
Problem
A Microsoft-to-Google migration needed provisioning, audit logging, exception handling, and backend services for roughly 600,000 users across multiple business units.
Outcome
Built Go services, Pulumi providers, and GCP infrastructure for provisioning, reconciliation, imports, and rollout.

Read the case study

Case study 02

Insurance: a global authorization platform for 320,000 users

Industry
Insurance
Scale
enterprise
Role
Lead architect for global authorization platform
Problem
A large organization needed a shared authorization service with common policies, decision logging, and secure delivery for around 320,000 users.
Outcome
Designed the OPA-based platform, built Go decision-logging components, and improved CI/CD, testing, and policy tooling.

Read the case study

Case study 03

SaaS: a multi-tenant event platform for live events

Industry
SaaS
Scale
scale-up
Role
Full-stack engineer for multi-tenant event platform
Problem
A virtual events platform needed product expansion, stronger tenant automation, and reliable operations while supporting multilingual events with up to 15,000 users.
Outcome
Delivered new collaboration features, tenant provisioning, CI/CD improvements, and performance work for large live events.

Read the case study

Case study 04

Industrial data: self-service integration on Kubernetes

Industry
Sensor and automation technology
Scale
multi-team-platform
Role
Platform architect for internal data systems
Problem
Data teams needed self-service integration, automated provisioning, and consistent policy, logging, and connectivity across NiFi, Trino, AKS, and supporting services.
Outcome
Added operators, platform automation, observability, and security controls that made the platform easier to extend and use.

Read the case study

Client feedback

From the authorization programme, after almost a year of working together.

He is well rounded from requirement management to architectural concepts, hands-on developing, and testing.

Christof V. Product Owner, reinsurance company LinkedIn recommendation

Supporting proof · Open source

Open-source tools I wrote out of client work

The part of the work that happens in public.

I maintain small tools around Kubernetes, secrets, policy and supply chain, and send fixes upstream when the gap belongs there.

Browse the repositories

Engagements

Offers

Four practical ways to bring in senior architecture, delivery, and implementation support.

  1. 01

    Platform and cloud modernization

    I clarify the target architecture, migration path and delivery guardrails for complex platform work.

    Engagement shape

    Assessment, architecture lead, or hands-on implementation support

    Service details

  2. 02

    Secure delivery and DevSecOps uplift

    I improve delivery flow, policy controls, supply-chain hygiene and operational confidence in high-stakes environments.

    Engagement shape

    Architecture, platform enablement, or rescue support

    Service details

  3. 03

    Data and integration-heavy internal systems

    I design or stabilize internal services, workflows and platform-connected systems that have to work reliably under real constraints.

    Engagement shape

    Technical advisory plus hands-on build support

    Service details

  4. 04

    Fractional architecture and delivery leadership

    I add senior technical direction during migrations, restructures or delivery-critical phases where teams need clarity and momentum.

    Engagement shape

    Fractional lead, advisor, or short intensive engagement

    Service details

Need senior support on one of these?

Share the context, constraints and delivery pressure. I can usually tell quickly whether I am the right fit.

Discuss your project

Who this is for

Best fit

For teams that need senior technical guidance and practical execution support at the same time.

  • Platform, product, and engineering teams navigating migration, governance, security, or delivery complexity.
  • Organizations that need architecture plus hands-on implementation support, not slide decks alone.
  • Leaders who need difficult platform, cloud, data, or integration work clarified quickly and moved into delivery.

How engagements usually run

How I work

Define the problem, make the key decisions, and support implementation where needed.

  1. 01

    Frame the real problem quickly, with the technical and delivery context that actually matters.

  2. 02

    Turn that context into clear architecture decisions, priorities, and execution guardrails.

  3. 03

    Work hands-on where implementation is risky, blocked, or delivery-critical.

  4. 04

    Leave the team with stronger patterns, clearer decision-making, and practical enablement.

Availability and collaboration

Built for practical collaboration

Enough context to judge fit, timing and working mode.

Location

Based in Crete, working across EU time zones.

Availability

Available for consulting engagements, advisory work, and focused delivery support.

Collaboration modes

  • Remote-first collaboration.
  • On-site workshops and delivery sessions by arrangement.
  • Short assessments, fractional support, or focused implementation phases.

Questions and answers

Questions about working together

Short answers to the questions that usually come up before a first conversation.

What does Marcel Heers do?

I am an independent consultant for platform, cloud, security and delivery work. I help CTOs, founders and engineering leads settle difficult technical decisions, unblock delivery, and stay hands-on where the implementation risk is highest.

What kinds of engagements do you take on?

Typical engagements are platform and cloud modernization, secure delivery and DevSecOps uplift, data and integration-heavy internal systems, and fractional architecture or delivery leadership. They often start as a short assessment and continue into hands-on implementation.

Are you available for remote work across the EU?

Yes. I am based in Crete and work remote-first across EU time zones. On-site workshops and delivery sessions are possible by arrangement.

Which technologies do you work with?

Kubernetes, infrastructure as code with Pulumi and Terraform, Go backends, OPA and Rego policy, CI/CD and supply-chain security, observability, and data platforms such as NiFi and Trino. I also take on pragmatic AI and automation work where it improves delivery.

How does an engagement usually start?

A short note with the team context, the problem to solve and the expected timing is enough. I reply with the most sensible next step, which may be a short assessment, an architecture session, or a scoped implementation engagement. You can also book an intro call directly.

Do you work with smaller teams as well as large enterprises?

Yes. I have worked with small product teams and with enterprise environments serving hundreds of thousands of users. The common fit is complex platform, cloud, security, data or delivery work where senior technical judgment and hands-on support are both needed.

Do you offer training and workshops?

Yes. I run workshops, mentoring and technical sessions on Kubernetes, infrastructure as code, Go, cloud platforms, DevOps and DevSecOps, policy and authorization, and related topics, either as part of an engagement or as focused enablement.

Start the conversation

Discuss the problem, scope, and next step

A short note with the team context, the problem to solve, and the expected timing is enough to get the conversation started.

Email

marcel@heers.it

Send a short note with the team context and I will reply with the most sensible next step.

Best first step

Fastest path to alignment Imprint