Berkeley Square IT

In 2000, four visionaries - traders from Susquehanna and an IBM developer - came together in a tiny New York office with a radical insight: quantitative thinking and collaborative problem solving could transform how markets operate. They founded Jane Street on the belief that by combining deep mathematical fluency with cutting-edge technology, they could manage risks others overlooked and provide liquidity when markets needed it most. From those humble beginnings, Jane Street evolved into a global quantitative trading powerhouse with over 3,000 employees across five offices worldwide. Today, the firm trades on more than 200 venues across 45 countries, continuously innovating in functional programming, machine learning, and programmable hardware. What started as a small group of traders and technologists has grown into a sophisticated organization where traders, researchers, and engineers work in tight loops to tackle the most difficult challenges in quantitative finance, all while maintaining the collaborative culture that has defined them from the start.

Malleum is a premier cybersecurity consultancy that blends advanced offensive and defensive strategies to safeguard organizations across multiple industries. With a team known for contributions to cybersecurity research at platforms like Black Hat and DEF CON, Malleum excels at identifying and mitigating sophisticated threats through penetration testing, application assessments, and comprehensive security solutions. The company has been successfully delivering high-quality security assessments for over 15 years, serving Fortune 100 companies, public sector clients, and critical infrastructure providers. Their research-driven team of hands-on information security specialists goes beyond simple vulnerability scanning to uncover some of the most sophisticated, hard-to-find security weaknesses. Malleum takes pride in being technical problem solvers who prioritize practical, usable solutions over check-box compliance, working deeply with clients to understand their unique security challenges and build robust cyber resilience.

Nagarro is a global digital engineering leader with 17,500 experts across 39 countries, delivering technology-led business breakthroughs for industry leaders and challengers. Specializing in "change the business" technology services, Nagarro helps clients become fluidic, innovative, digital-first companies. The company's full-service offering spans Digital Engineering, Intelligent Enterprise, and Experience and Design, serving industries from automotive and banking to life sciences and retail. Founded in 1996 and publicly traded on the Frankfurt Stock Exchange since 2020, Nagarro has achieved €1 billion in revenue (2023) with 17,695 employees worldwide. The company's unique Fluidic Enterprise vision and CARING mindset enable organizations to harness AI, data analytics, and cutting-edge technologies to achieve at least 20% gains in productivity and performance. From SAP transformations to cloud-native solutions, Nagarro's agile, non-hierarchical culture drives measurable impact for clients globally.

Northstrat exists to solve the most complex technology challenges facing our nation's security. Every day, critical missions in the Intelligence, Defense, and Law Enforcement communities depend on software and systems that simply cannot fail. When these systems are built on outdated approaches or stretched beyond their limits, the risks aren't just technical - they threaten the safety and effectiveness of the people protecting our country. Northstrat was founded in 2006 to change this reality, bringing together exceptional engineers who understand that national security isn't an abstract concept - it's real people making decisions with real consequences. Our employee-owned structure means every person who builds these solutions has a personal stake in their success, creating accountability that drives excellence in every line of code and every system architecture we design. What sets Northstrat apart is our commitment to the people behind the technology. We've built a culture that proves you can deliver mission-critical software for the most demanding government clients while maintaining genuine work-life balance. Our Individual Benefits Account puts employees in control of their compensation, with 50% of monthly salary accruing as additional benefits - from medical coverage to retirement contributions through our Profit Sharing Plan. This approach has earned us recognition as a 2025 Top Workplace, ranked #2 among mid-size companies by The Washington Post. We specialize in Agile Software Development, Business Intelligence & Analytics, Intelligence Mission Systems, Systems Engineering, and IT infrastructure that powers classified and commercial projects alike. Whether it's satellite mission management systems, command and control platforms, or data analytics that transform complex information into actionable intelligence, we deliver solutions that work because we understand what's at stake.

We're a global team of ServiceNow specialists who believe work should flow, not falter. Founded in 2013, we've grown from a handful of consultants in the Netherlands to more than 750 people across 13 countries. Our focus is simple: we help organizations cut through complexity using ServiceNow's platform, whether that means streamlining IT operations, transforming HR processes, or building custom applications that solve real business problems. What makes us different is that we're purely focused on ServiceNow – it's not just something we do, it's everything we do. Our team works across the entire spectrum, from advising clients on strategy to implementing solutions and providing ongoing managed services. We've been recognized as a ServiceNow Elite Partner and earned multiple awards, but what we're most proud of is the measurable impact we deliver for the 200+ organizations we work with. We combine technical expertise with industry experience to make workflows smarter, faster, and more human-friendly.

The London Borough of Camden operates as a forward-thinking local government organization serving one of London's most diverse urban communities, employing around 4,000 staff to deliver public services across the borough. Under CEO Jon Rowney, the council manages critical infrastructure and community services for a densely populated area that sits at the intersection of significant digital governance challenges - from protecting resident data to securing service delivery systems that vulnerable populations depend on daily. The organization positions itself with what it calls a "proud, rebellious spirit," focused on tackling inequality and poverty through technology-enabled service transformation. This means cybersecurity teams here operate in an environment where protecting systems isn't abstract: compromised housing databases, benefits administration platforms, or child safeguarding records create immediate, material harm to residents. The borough's commitment to giving everyone "a voice and stake in decisions about their lives" translates to digital infrastructure that must be both accessible and defensible - a non-trivial engineering challenge in local government contexts. Camden describes its culture as cutting-edge and diverse, recruiting for attitude and developing for skills. Security practitioners work within a framework where staff are expected to "focus on customers, take responsibility, work together and find better ways of doing things." The organization explicitly states its commitment to safeguarding vulnerable adults, children, and young people - language that signals the regulatory and ethical weight of security work here. Threat models include everything from ransomware attacks on core services to insider risks in systems handling sensitive social care data. For security professionals, this represents public sector work at operational scale: protecting infrastructure that real communities rely on, within budget constraints and compliance frameworks specific to UK local government. The borough's stated embrace of "change and diversity of thinking" suggests openness to modern security practices, though the realities of legacy systems and procurement processes in local government will shape what's actually deployable.