Karriere bei Thalia Bücher GmbH

Deloitte GmbH Wirtschaftsprüfungsgesellschaft operates as the German arm of a professional services organization with nearly 180 years of evolution from a small London accounting firm into a global network spanning 150+ countries. Under CEO Volker Krug, the firm delivers audit, tax, consulting, financial advisory, risk management, and legal services to international corporations, medium-sized enterprises, public sector entities, and nonprofits. The organization serves nearly 90% of the Fortune Global 500 alongside thousands of private companies across every sector of the economy. The firm's cybersecurity practice operates at the intersection of threat detection and enterprise security architecture. Teams work with a technical stack that includes IBM QRadar, Exabeam, Splunk, and ElasticSearch for security monitoring and analysis, while infrastructure runs on Azure and AWS with containerization via Docker and Kubernetes. The practice handles connected vehicle security for manufacturing clients, protects enterprise systems built on SAP, Salesforce, and ServiceNow, and deploys RSA security frameworks. Cybersecurity capabilities integrate with broader digital transformation and artificial intelligence practices, particularly around generative AI implementations that require new threat modeling. Technical work happens in Python and PowerShell environments across Linux systems. The German operation positions cybersecurity alongside risk management services, creating operational overlap between security architecture, compliance frameworks, and business continuity planning. Client engagements span financial institutions requiring regulatory compliance, manufacturers securing connected products, and public agencies building resilient infrastructure. The firm's scale enables access to global threat intelligence and cross-border incident response capabilities, though like most large professional services organizations, project structure and client mix vary significantly across practices.

Deutsche Glasfaser operates Germany's largest rural fiber-optic infrastructure, managing approximately 2.5 million FTTH connections across more than 1,750 municipalities. Backed by over €10 billion in private investment from EQT and OMERS, the company plans, builds, and operates open-access fiber networks serving residential, business, and public-sector customers - around 1.5 million contracted endpoints at scale. The threat surface spans operational technology for network management, customer data across a distributed footprint, and the attack vectors inherent in managing critical telecommunications infrastructure. The security stack centers on Microsoft Defender for Endpoint and Sentinel for detection and response, with Tenable handling vulnerability management and a SIEM correlating events across the environment. Engineering workflows run through Atlassian tooling - JIRA, Confluence, and ScriptRunner - creating integration points that require hardening. The operational model demands securing both the physical network construction process and the digital service layer, with particular attention to supply chain integrity in hardware deployment and access control across a geographically dispersed infrastructure. Under CEO Andreas Pfisterer, the company positions itself as a technology leader in cost-efficient FTTH expansion, which translates to velocity pressures on security architecture. Defending rural broadband infrastructure means balancing rapid rollout demands against the need for consistent security controls across municipalities with varying maturity levels. The open-access model introduces shared responsibility boundaries with service providers using the network, requiring clear threat models for multi-tenant environments and robust monitoring at handoff points.

We've been deeply rooted in northwest Germany for nearly 100 years, and we're proud to be one of the leading energy companies in the German sector. Our team of about 9,000 people works every day to connect energy, telecommunications, and IT - three essential industries that are shaping our future. We supply green energy, secure networks, and high-speed internet to communities across our regions, supporting everything from residential homes to large municipalities and businesses. Our approach is hands-on and practical: we're actively building wind farms, expanding fiber optic networks, developing hydrogen storage solutions, and rolling out charging infrastructure for electric vehicles. We believe the energy transition and digitalization go hand in hand, and we're committed to making both work for the people in our regions.

Schwarz IT is the technological heartbeat of the Schwarz Group, one of the world's leading retail organizations with over 575,000 employees and 13,900 stores across more than 30 countries. With annual revenue exceeding 167 billion euros, Schwarz IT manages the entire digital infrastructure and software solutions for the Group's retail divisions Lidl and Kaufland, as well as Schwarz Produktion, PreZero, and Schwarz Digits. The company has established itself as one of Germany's largest IT players, covering the complete food value chain through state-of-the-art digital solutions and services. Operating from multiple international locations including Germany, Spain, Bulgaria, and Romania, Schwarz IT delivers comprehensive IT expertise spanning classic software development, IT consulting, artificial intelligence applications, and IT security. The organization employs a solution-driven approach built on partnership, ownership, vision-driven innovation, and enthusiasm. Schwarz IT manages critical technology platforms including SAP systems, Microsoft Azure cloud infrastructure, STACKIT (the European sovereign cloud), and enterprise security platforms. The company serves as the backbone for one of Europe's largest retail groups, processing operations for 6 billion customers while maintaining excellence in quality, stability, and cost-effectiveness.

b2venture is a European venture firm that exists to transform how early-stage startups access capital and expertise. Founded in 2000 as BrainsToVentures, the firm emerged from the recognition that entrepreneurs in Europe lacked the support structures available elsewhere. By building an unparalleled community of angel investors and venture professionals, b2venture provides the fuel ambitious founders need at the earliest stages when capital is hardest to secure. The firm invests between EUR 250,000 and EUR 5 million in Pre-Seed, Seed, and Series A rounds, specifically targeting digital and industrial technology companies poised for breakthrough impact. What makes b2venture unique is its multi-generational approach to venture capital. Rather than simply writing checks, the firm creates a virtuous cycle where successful entrepreneurs become angel investors, mentoring the next generation of outliers. This collaborative model has backed companies like DeepL, SumUp, and Raisin - startups that have grown into European technology champions. By leveraging the collective wisdom of its angel community alongside disciplined investment processes, b2venture provides founders with more than capital; they gain partners who understand the challenges of building extraordinary businesses and stay committed from seed stage through IPO.

Nordzucker AG operates 18 production facilities across Germany, Denmark, Finland, Lithuania, and Australia, producing sugar from both beet and cane alongside bioethanol, animal feed, fertilizers, molasses, and alternative plant-based proteins. The company employs approximately 3,500 people and traces its roots to 1838, when the first beet sugar factory was established in Klein Wanzleben. Since then, it has expanded through strategic acquisitions, including Nordic Sugar in 2009 and a majority stake in Australia's Mackay Sugar in 2019. The industrial control environment spans multiple OT platforms: Siemens S7, Siemens LOGO!, and PCS7 systems, alongside Foxboro, ABB, Honeywell, and Valmet infrastructure. Production facilities processing agricultural feedstock at scale create a significant attack surface - operational technology securing fermentation processes, steam generation, crystallization equipment, and continuous material handling systems. The company references IEC 62443, the industrial automation security standard, signaling awareness of the threat model facing critical infrastructure in food production. Nordzucker emphasizes supply chain and value chain transparency, environmental management, and quality standards across its operations. The distributed nature of production - spanning two continents with facilities in five countries - means securing both industrial control systems and the IT networks connecting growers, production sites, and distribution channels. With core values including responsibility and dedication, the company positions itself as a modern international operation maintaining close ties with agricultural partners while managing the complex operational security demands of food manufacturing infrastructure.