Cerulean Circle GmbH


Products & Services

Our Team

Our Mission

Our Way


Rüdiger Knoblach

Marcel Donges

Technology & Engineering

Marcel is a chief architect of Digital Transformation and a true internet visionary. Over the past 20 years, Marcel Donges has worked for companies like Deutsche Post, Huawei and Deutsche Bahn as a software architect, business designer and executive coach.


Find out more about Marcel:

Sales & Marketing

Rüdiger is an industry veteran with 25 years sales and marketing experience in IT companies like Digital Equipment and Silicon Graphics. His startup "Business TV GmbH" is a supplier to the Entertainment industry since 2001 serving customers like Sky television and Deutsche Telekom.

Find out more about Rüdiger:

Our Team


The legal Stuff:


Cerulean Circle GmbH

with its legal seat in:

Wittelsbacherplatz 1

80333 München

is a corporation with limited liability under German law


Its managing directors (Geschäftsführer) are:

Marcel Donges, Munich

Andrea Rümmelein, Frankfurt

Manish Jain, Mumbai


The company is registered in Munich at

AG München, HRB 233251


Our mail account for general enquiries is info at ourdomainname dot com


Products & Services

We provide products and services for the entire project lifecycle, from the planning phase where we help identify a valid business model for the planned services, through the operational phases where  the investment will be recouped.

We adhere to proven standards like the CMM maturity model, ITIL best practices, and an implementation with microservices and SOA.

Ask us about your toughest problem in each of the phases.

Our Mission

We help our customers throughout the software lifecycle, from inception through building and deploying and running a product. We do this by helping them increase their maturity level, according to the CMM maturity model.

Planning Phase

Your next product needs a solid business model or else it will become a liability instead of an asset. We can help you build a solid, reliable and presentable business model for the digital world.  Our experienced architects can guide you in the right direction so that the resulting implementations will be open and scalable and not lock you in any proprietary technology. 

Build Phase

We offer trainings, coaching, and outsourced product development.

We can help you build a prototype product within given time and budget constraints.

The prototype should be feature-constrained but should already generate revenues to prove the underlying business model.



Our RapidSOA approach is well proven to deliver predictable results. If you chose to outsource the development we can find the right partner for your project and provide project managers to assist your internal staff. 

Deploy / Integrate

How mature are your deployment processes

  1. If your staff reads pdf and word documents and follows the directions, it is a manual process.
  2. If you use build tools like make and ant, your process is template driven.
  3. With the various packet managers, a repository and a build engine like maven, your processes can be considered 'defined'. Chances are that you are using different tools on each platform.



The numbers 1-3 relate to the maturity levels in the CMM maturity model. Can we introduce you to a more mature way of doing things ?

Deploy Part II

What would be the more mature model for deploying your IT services ? 

  1. a mechanism which works across all platforms
  2. which works for modern and legacy apps alike
  3. which encapsulates all apps so that they become independent and can run anywhere


We built such a tool for one of our clients, and we can build it for your infrastructure as well.


Run Phase

During the run phase, your app or service will allow its users to benefit from its existence, and will hopefully be making money for your company.

If set up correctly, it will scale automatically if demand grows, and free up resources if demand is low.

You will in this case be able to benefit from elastic growth if you migrate your infrastructure to the cloud.


Our ITIL-2020 approach will introduce you to Data Center Management of the future and to Cloud (Reverse) Migration CMM Level 4. Request more info here.

Recycling Phase

At some point in time, your applications life will come to an end and a new release, a new major version, or a replacement product will be planned. 


New requirements have to be defined, maybe more connectivity to other inhouse and external services, and probably a more modern UX has to be designed.


The life cycle starts over again.

Trainings & Events

Before the Internet of Things, there needs to be an Internet of Services.                 - Marcel Donges, 2005

In this workshop class we teach how to develop a business model for the Digital Age, and then we design and build one for you to present to your stakeholders. Because of the confidential nature of the product design, this workshop can only be booked by companies and two participants each from both product development and IT need to be present for the whole workshop.  

The preferred way to produce a rapid prototype is by storing the content in a graph database like Neo4j and using an IDE like structr. 

We use this combination for our prototypes and products and invite you to learn how to use these tools. We offer trainings for be ginners, advanced users and sys admins.

Business Development 4.0

RapidSOA workshop - learn the agile methodology to create applications with SOA (service oriented architecture)  and build a complete working prototype which will generate revenue for your self-designed digital business model.  

Dates 2017

May 11th 2017- GraphConnect London

A CMM4 Managed Environment for Data Centers

Marcel and Axel will talk about  Configuration Management at Deutsche Bahn. In this talk, Marcel and Axel will illustrate how a team at the Deutsche Bahn subsidiary DB Systel built a CMM-4 (Capability Maturity Model) configuration and environment management tool.


Trainings in June and July 2017

June 6th - structr Beginner Training, Frankfurt

June 7th - structr Admin Training, Frankfurt

June 8th - structr Advanced Training, Frankfurt

July 12-14th - RapidSOA Training, Munich


Business Development 4.0

Our Business Development classes for Digital Transformation will be held on demand and exclusively for companies who book it.

The first two blocks can be delivered as classroom training in an off-site location. From Business Model Implementation onward, we accompany your projects.


The CMM Maturity Model

The CMM  Model developed by CMU (Carnegie Mellon University) rates quality levels with one out of five stages. The five stages are:

  1. Initial - the basic state if an activity is conducted for the first time, or without any defined process. This leads to the following results: cost, time, quality not predictable
  2. Repeatable - a basic process exists, new projects are based on experience with previous projects. The results are typically: execution time can be predicted, cost and quality will vary considerable.
  3. Defined - the organization has implemented and documented a standardized software development and maintenance process. An organizational unit is in charge of implementation. Cost and timing can be controlled to a large extent, quality will still vary.
  4. Managed - there are quantitative goals for both the product and the process. These goals are measured and monitored. Times, cost and quality can be reliably monitored.
  5. Optimizing - the whole organization is concentrated on discovering weaknesses and further improvement of the process. This is most likely over-engineered and pareto inefficient


This model can not only be applied to IT processes, but to all other kinds of activities and even to whole organizations. We help companies reach the next level of maturity.

Data Center Automation

Is your data center operation a manual process ?

  • How can you be sure that your test environment is exactly he same as your live environment ?
  • Are you ready for Cloud Migration - and back if necessary ?
  • If one server or service fails, how do you know what other services are affected because they rely on it ?
  • If two services fail - which one has a higher priority and needs to be fixed first ?