We build, refactor, and operate Sitecore at scale.
Legacy Sitecore that needs to evolve. Multi-brand portfolios that need consolidation. The XM Cloud transition. A platform inherited from another firm. The stay-or-leave decision. We deliver inside all of them.
Built by senior practitioners who worked alongside the team that built Sitecore Headless Services.
The Sitecore situation
The Sitecore work we're built for.
Six Sitecore situations we deliver against.
The XM Cloud transition
An existing Sitecore XP investment, and a real plan needed for the move to XM Cloud. What can be lifted, what needs to be rebuilt, what to deprecate, what the sequencing looks like, and how to ship the transition without a freeze window.
Legacy Sitecore that needs to evolve
A Sitecore implementation that runs but no one trusts to change. Aging templates, overgrown content models, customizations that block upgrades. Modernized incrementally onto a headless architecture without taking the site offline.
Multi-brand Sitecore portfolios
Multiple Sitecore instances, parallel implementations, overlapping content models. Consolidate into coherent multi-brand environments with shared governance, shared components, and a single content authority.
Sitecore taken over from another firm
An implementation built by another partner that needs a new owner. Onboarded with a structured assessment, stabilized in production, and evolved on the same architectural principles whether the prior approach matched them or not.
Stay-or-leave decisions
Pressure to evaluate Sitecore against composable alternatives. The decision needs senior architectural perspective, an honest read on the trade-offs, and a path that doesn't lock in the answer before the analysis is done.
Sitecore on Azure end-to-end
The Sitecore implementation and the Azure foundation it runs on, designed and operated as one system. Cloud infrastructure, security posture, and DevOps maturity matched to what Sitecore actually requires in production.
What Assembly does differently
Sitecore work that holds up because of how it's delivered.
01
Worked alongside the team that built JSS.
Our Headless Services leads collaborated directly with the internal Sitecore engineers who built Sitecore JavaScript Services, the foundation that became Sitecore Headless Services. That depth of context is rare outside the platform vendor itself, and it shows up in the architecture decisions we make on every engagement.
02
Senior practitioners on every engagement.
The Sitecore decisions you make once (XM Cloud transition, headless migration, multi-brand consolidation) are advised by senior practitioners who have lived through them at enterprise scale. The people who scope engagements are the people who deliver them.
03
Sitecore, Azure, and the rest of the estate from one team.
Most Sitecore shops don't run Azure. Most Azure shops don't run Sitecore. Assembly does both, with the same senior practitioners across content platform, cloud foundation, and the integrations that connect Sitecore to the rest of the digital estate. One accountable team, no handoffs at the boundaries.
04
Incremental modernization that holds up in multi-brand portfolios.
Page-by-page, section-by-section, sub-application-by-sub-application. The patterns we use for Sitecore modernization were proven on multi-brand portfolios where the live site couldn't be taken offline and the modernization had to ship value continuously. Not theoretical.
Sitecore in production
What Sitecore work at scale looks like in practice.
Global content platform · multi-brand
A headless Sitecore portfolio modernized in place.
A content platform spanning dozens of properties and multiple brands, modernized from legacy Sitecore to a headless architecture on Azure. Live operations kept running through the modernization. Internal team enabled to manage and grow the platform on their own. Better performance, lower run cost.
Read the case study →Global automotive OEM · digital experience layer
A Sitecore-anchored experience layer for digital speed.
A global automotive operating environment needed a digital foundation built for scale. Centralized data, Azure cloud foundation, automated DevOps, and a Sitecore-anchored experience layer. Faster delivery, smarter customer experiences, lower operational overhead.
Read the case study →Sitecore Q&A
The questions Sitecore buyers ask.
The questions that come up most often during evaluation, scoping, and partner-selection conversations.
We're on Sitecore XP and considering XM Cloud. How does that work?
The XM Cloud transition is rarely a lift. What can be moved cleanly depends on how the existing XP implementation was built (template structure, customizations, Helix adherence, integrations). We start with an assessment that maps the existing implementation, identifies what's portable, what needs to be rebuilt, and what to deprecate, and produces a sequencing plan that ships the transition incrementally rather than as a single cutover. Most clients land on a hybrid approach: parts of the estate move to XM Cloud first, others stay on XP through a transition window.
We have an existing Sitecore implementation built by another firm. Will you take it over?
Yes. We onboard inherited Sitecore implementations regularly. The first phase is structured: an assessment of the existing setup, a stabilization plan, and a clear understanding of where the prior approach matched our principles and where it didn't. Whether the original architecture matches Assembly's standards or not, we work with what's there and evolve it on the same architectural patterns we apply to greenfield work.
We're not sure if we should stay on Sitecore or migrate to a composable stack. Can you help us decide?
Yes, and we won't lock you in to the answer before the analysis is done. The stay-or-leave decision depends on the scale of your existing investment, the trajectory of your content needs, the technical debt in the current implementation, and what your roadmap requires. We bring senior architectural perspective to the evaluation, an honest read on Sitecore's current direction, and the experience of having delivered both Sitecore and composable platforms at enterprise scale. The output is a recommendation with the trade-offs surfaced clearly.
We're a multi-brand organization with multiple Sitecore instances. Can you consolidate?
Yes. Multi-brand Sitecore consolidation is one of the situations we deliver against regularly. The work usually combines content-model unification, shared component libraries, governance design, and incremental migration of brand sites onto the consolidated platform without freezing live operations. The patterns we use were proven on multi-brand portfolios.
How much of our existing Sitecore implementation can be preserved when moving to headless?
More than most teams expect. Content, content models, item structure, workflows, and authoring UX usually transfer cleanly. What changes is the rendering layer (templates and renderings give way to a modern frontend talking to Sitecore Headless Services) and the integration layer (APIs replace direct rendering). The assessment phase produces a clear inventory of what carries over, what gets rebuilt, and what to deprecate.
Can we engage Assembly for Sitecore managed services on a platform we didn't originally build?
Yes. We support Sitecore platforms in production whether we built them or not, with a structured onboarding to bring the existing implementation into our operations model. The strongest version of our managed services is on platforms we built ourselves, but the team has the depth to take over implementations from other firms and operate them with confidence.
Modern Sitecore tech stack
What we work with.
Headless Sitecore implementations on Azure, modern frontend frameworks, and the DevOps practices that make continuous delivery possible.
Where Sitecore work fits
Part of our Digital Experience Platforms practice.
Sitecore is one of several content platforms in our Digital Experience Platforms practice. The same patterns apply across CMS technologies: incremental modernization, headless architecture, multi-brand governance, operate-and-evolve engagements. Our Digital Experience Platforms team consolidates and modernizes complex content platforms on Sitecore, Drupal, Contentful, and similar.
Complex digital estates don't respect domain boundaries. Sitecore is often the customer-facing content layer that sits on top of an Azure foundation, integrates with custom applications, and feeds personalization data back into the rest of the estate. When the work spans applications, data, and infrastructure together with Sitecore, the engagement belongs inside our flagship Digital Estate Modernization work.
For Assembly's formal Sitecore partnership credentials, certifications, and the institutional context behind the practice, see Sitecore Partners.
Talk to a Sitecore practitioner