In a previous blog, I have worked through the purpose and function of the Owner Interface Manager (OIM role) along with what works well when it functions effectively.
This blog works through the people and relationship side of the OIM role. Alliances succeed or fail on people, not just process. And few roles are more crucial in connecting those people — and keeping them aligned — than the Owner Interface Manager (OIM) and their team.
The OIM sits at the intersection between the client (the “Owner”) and the Alliance, helping both sides operate with trust, clarity and shared purpose. When the OIM role works well, it becomes the glue that holds complex projects and programme of works together and builds trust and momentum between the client and the Project or Programme Alliance team.
Why the OIM Role Matters
In every major infrastructure project or programme alliance, there’s a fine balance between governance and delivery. Without a clear bridge between the two, projects and programmes of work can easily lose momentum or alignment.
That’s where the OIM function steps in. The OIM’s team purpose is to:
- Connect people across governance and delivery
- Translate board and client language into project or programme language (and vice versa)
- Escalate and resolve issues early, before they become roadblocks
- Champion “Best for Project” outcomes over individual agendas
- Manage the interface between the client subject matter expert (SME’s) and the project
- Provide context and background information to key decisions, methodology of previous work undertaken which helps all parties move at pace together
The role isn’t about slowing progress or adding layers. It’s about keeping the project or programme moving — ensuring decisions are timely, risks are managed, SME’s are appropriately engaged and everyone is working towards the same goals and taken along for the journey.
The Essence of a Great OIM
A great OIM acts as connector, translator and coach. They help create a culture where people can disagree well, debate openly, align and commit and still move forward united together.
As one of my favourite quotes from alliance pioneer Jim Ross reminds us:
“No matter how well they are set up, a project or programme alliance will not deliver outstanding outcomes unless there is an outstanding team of people working within a high-performance culture.”
Culture beats structure every time — and the OIM team is one of the key drivers of that culture. It enables and empowers the Alliance but also ensures the Client is engaged through the process.
How OIMs Build Partnering Strength
Partnering is about more than cooperation and collaboration — it’s about trust, expectation management, clarity, reliability and presence.
- Trust – When the OIM role is visible and decisions are backed and supported by the owner, confidence grows across the alliance.
- Clarity – Defined swim lanes for the SME’s and consistent communication reduce confusion and friction. Everyone knows who needs to be engaged and when.
- Presence – Being embedded in the alliance team day-to-day builds credibility, context, and momentum.
When these ingredients come together, the alliance starts to “gel.” People stop working as representatives of their organisations and start acting as one team.
Challenges and Opportunities
Like many bridge roles, OIMs can sometimes be misunderstood. They may be seen as “just oversight” or “another layer of governance.” In reality, their success depends on trust, integration and role clarity.
Key challenges often include:
- Balancing governance detail with delivery pragmatism
- Wearing “two hats” as a member of the Alliance and also ensuring the Client get what was signed up for in terms of the Project Alliance Agreement (PAA) and Target Outturn Cost (TOC)
- Clarifying roles between OIM, Client Governance, PAB, and ALT
- Ensuring consistent assurance without over-control
- Embedding the OIM early enough to build relationships and trust before pressure points arise
When done well, the OIM adds immense value — bringing speed, confidence, and unity to decision-making on any project. It is in the Top 3 roles on an Alliance in terms of the impact it can have in a constructive manner. It requires leadership skills in key areas around achievement, collaboration, influence and the ability to progress matters that require skillful persuasion across a variety of stakeholders.
The OIM–SME Partnership
Owner Interface Managers also play a critical role in connecting Subject Matter Experts (SMEs) to the alliance delivery teams. An effective OIM “clears the runway so SMEs can fly and engage playing to their strengths” — engaging early, building relationships, and ensuring technical expertise is aligned with delivery needs to benefit the Alliance.
This proactive approach avoids rework, reduces friction, and strengthens both assurance and performance. Engaging SME’s early and at the right times is a skill in itself which requires the ability to balance achievement with taking people along for the journey.
The OIM role is about much more than governance — it’s about trust, alignment and outcomes. By acting as a bridge between owner and alliance, OIMs create the conditions where collaboration thrives, trust is built and results accelerate.
In short, OIMs help the alliance gel. They don’t just manage relationships — they enable the conversations, build the trust and create shared clarity that make success possible.
When done well, they are the unsung heroes who make “Best for Project and/or Programme” not just a phrase — but a lived daily reality. They are the true bricklayers in an alliance that builds strong foundations of trust between the client organisation and the Alliance which is essentially an additional client business unit.
