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Principal Consultant


Sigma Systems, a Hansen Technologies company, is the global leader in catalog-driven software solutions for communications, media and high-tech companies. We proudly support a wide variety of services, including enhanced TV, on-demand video, service management, voice and high-speed data communications with our award winning products.



We are looking for a Principal Consultant to join our amazing team in London! You will be responsible for working directly with a leading EMEA based customer, part of a multi-million-pound digital transformation program. You will support the region as the need arises including partners and system integrators who will be looking to you for guidance, best practice and thought leadership on the implementation, configuration and use of our software. You will leverage your experiences in a wide range of technologies to drive activities across a variety of competencies: Telco consulting & domain expertise, solution architecture, product modeling and process modeling.

Depending on your background and expertise, you may tend to focus either more on the business aspects or more on the architectural aspects of the implementation.  We are looking for someone who can specialize in one area or the other, but who can competently execute both functions and have come from a reputable vendor with telco consulting and BSS/OSS Catalog and CPQ expertise.



If you have a business area of expertise, duties and responsibilities include:

  • Conduct product modeling workshops
  • Design and develop rationalized product models
  • Configure the Sigma software solution
  • Execute Configuration Management
  • Define Product Data Migration
  • Provide subject matter expertise on the operationalization of Sigma software solutions in the organization
  • Design, develop and deploy process and organizational models orientated around the rollout and use of our software solutions
  • Design and produce functional specifications for all areas of implementation work
  • Develop training materials for the Training competency and deliver training courses where applicable
  • Product implementation consultancy on Business and Product Architecture
  • Regularly contribute new product roadmap ideas

If you have a technical area of expertise, duties and responsibilities include:

  • Solution / Technical Architecture
  • Design and document all configuration, customization and integration designs
  • Guide the client or systems integrator through test phases with experience of agile testing principles
  • Contribute to internal asset development through regularly contributing to the standard Delivery Methodology and implementation tools
  • Support and direct the integration of Sigma software with 3rd party systems through various possible mechanisms (e.g. P2P, web services, EAI/ESB/middleware)
  • Define Integration, migration, and deployment architectures

Regardless of area of expertise, the ideal candidate will be comfortable with the following duties and responsibilities:

  • Pre-sales support
  • Work in a customer-facing, time-driven (agile) project delivery environment potentially, sometimes with / through a 3rd party systems integrator
  • Manage tasks and work load and report/communicate issues and status
  • Actively raise, track and resolve project issues and risks
  • Provide product expertise and best practice to customers and partners
  • Provide support to junior staff
  • Ensure that decisions taken comply with Sigma methodology, strategic architecture and direction


  • Experience of BSS/OSS solutions specializing in Catalog, Configure Price Quote, Order Management and Provisioning.
  • Understanding of BSS/OSS needs of clients for Telco, Cable & Wireless operators,
  • Experience of integrating with products from major vendors like Amdocs, Cloudsense, Lucent Alcatel, Huawei, Netcracker and Ericsson, etc.
  • Significant experience with software solutions in the telecommunications, cable, and/or high-tech sector
  • Proven experience working with external clients in a technical consulting role, driving requirements and workshops using a use case-oriented approach
  • Experience working with agile methods of project delivery, either in an agile environment or as part of an agile team
  • Able to work with UML and other design languages
  • Familiarity with general TM Forum Framworx concepts
  • Understand the typical retail product lifecycle management process
  • Possess a strong working knowledge of a number of technology standards including:
  • CSP BSS & OSS systems
  • Technology standards:


Microsoft framework
Web Services

  • Application development (e.g., C#, C++, JavaScript, EJB, XML, XSD, XSLT)
  • RDBMS (e.g., MS-SQL Server, Oracle)
  • Good working knowledge of integration and EAI
  • Working knowledge of integration techniques and impact of data model design on integration and performance
  • Ability to lead requirements and design workshops
  • Ability to operate in fast moving team environment delivering to tight schedules in a demanding technical environment
  • Ability to understand customer business requirements and relate them to Sigma technologies
  • Experience with and knowledge of:
  • Complex Communications, Media & High-Tech deployment and operating environments
  • Configuration Management principles
  • CM&HT IT software / hardware topologies
  • Strong experience of data modeling and data mapping between applications
  • Pro-active self-starter who can take the initiative and operate independently, and is flexible in their approach and able to tolerate change and ambiguity
  • Excellent interpersonal skills and ability to influence external clients to achieve successful results and communicate technical ideas
  • Outstanding problem-solving skills and willing to get involved in the detail and be hands-on (be it in design or in technical configuration activities)
  • Proven ability to achieve challenging goals and objectives or deadlines
  • Willingness to travel (could be up to 75% of the time)
  • Desirable to have some knowledge experience of Sigma products.



In June 2019, Sigma Systems was acquired by Hansen Technologies, the leading global provider of billing software, customer care, data management and catalog-driven technologies for Pay-TV operators, telecommunications providers, energy and utilities companies. Founded in 1971, Hansen Technologies (ASX: HSN) now employs over 1,500 people with offices around the world, including Australia, the United States, Canada, New Zealand, Denmark, Germany, Argentina, Brazil, China, India, Vietnam and the United Kingdom, servicing 600 customers in over 80 countries across the globe. To find out more about Hansen go to

For Sigma Systems employees, this acquisition represents a great opportunity for growth. With a larger organization comes the potential for new responsibilities, more choices and career advancement.



When you join Sigma Systems, you are part of a global award-winning company that cares about its employees – and is recognized as such. We have been certified as a Great Place to Work® by Great Place to Work® Institute Canada, and have also received the Gold Standard from Deloitte, in the category of Canada’s Best Managed Companies. We are also proud to be recognized as one of Greater Toronto’s Top Employers by The Globe and Mail. Sigma Systems has also been named among the 30 Best Companies to Work For in Wales, in recognition of our achievements in workplace health and well-being.

For us, it’s all about our people. Our team is what makes us great and it’s who we are most proud of. When you walk into any Sigma office around the world, you’ll immediately feel a part of something special.

  • A comprehensive benefit plan
  • Professional Development Program
  • Employee Recognition Program
  • A flexible work environment
  • Private Medical Health Insurance
  • Great Social Events

At Sigma, our employees’ well-being and development is a core principle. We are an equal opportunity employer and believe in diversity and inclusion. We believe that when our employees live a well-balanced life, we become stronger as a team. If this sounds like a team you want to be a part of, don’t hesitate to apply. We would love to hear from you.

If you are interested in this opportunity, please send your CV to

Sigma welcomes and encourages applications from people with disabilities. Accommodations are available on request for candidates taking part in all aspects of the selection process.