Meet the Team
Our team brings deep experience in delivering complex ICT programs across government and enterprise environments. We combine technical expertise, delivery capability, and a strong focus on security to ensure consistent, high-quality outcomes for our clients.

ADAM MITCHELL
Managing Director & Founder | Thinkstream | Trusted ICT Delivery | Government & Enterprise Programs | ISO 27001 | Security & Governance

ROSIE Harris
Executive Assistant | Thinkstream | Operations & Leadership Coordination | Client & Team Engagement | Business Operations
Rosie is the Executive Assistant to Thinkstream’s leadership team and a key contributor across all areas of the business.
Having been with Thinkstream for almost a decade, Rosie plays an integral role in supporting the organisation’s day-to-day operations and ensuring consistency across both internal and client-facing activities. She works closely with Adam and Michelle, supporting all aspects of leadership, operations and strategic initiatives.
Rosie is a central point of contact for Thinkstream’s team members, as well as government and private sector clients. She manages a wide range of responsibilities including client communication, contract coordination, payroll support, operational processes and event delivery.
Her role extends across multiple functions of the business, combining elements of executive support, office management and operational coordination. Rosie also works closely with Michelle across marketing initiatives and supports the delivery of Thinkstream Together, contributing to the organisation’s community partnerships and events.
In addition, Rosie plays a role in supporting Thinkstream’s Queensland presence, contributing to coordination and operations across the Noosa office.
Rosie is known for her reliability, attention to detail and ability to manage multiple priorities seamlessly. Her deep understanding of the business and strong relationships across the organisation make her a trusted and valued member of the Thinkstream team.

Rohan UNTERSTEINER
Director of Professional Services | Thinkstream | ICT Recruitment & Strategic Delivery | Government & Private Sector | Business Growth & Client Partnerships
Rohan is the Director of Professional Services at Thinkstream, where he leads strategic delivery and talent capability across the business, supporting client outcomes and organisational growth.
With over 17 years of experience across the Telecommunications and Information Technology sectors, Rohan delivers ICT professional services and strategic sourcing solutions to both government and private sector clients.
At Thinkstream, Rohan leads our recruitment function and broader professional services delivery, ensuring we source high-quality talent and deliver outcomes across client engagements. He works directly with clients to understand requirements, shape service offerings, and align capability with delivery models to meet their objectives.
Rohan is also a key client contact across Thinkstream’s government and private-sector engagements, building and maintaining strong relationships while ensuring a consistent, high-quality delivery experience.
In addition to leading delivery and talent capability, Rohan contributes to business development and growth by identifying new opportunities, leading tender responses, and helping shape Thinkstream’s strategic direction.
Rohan also supports Thinkstream’s information security framework in his role as Security Officer, working alongside the organisation’s Chief Security Officer to ensure security practices are maintained across operations.
Rohan is known for his strong industry network, practical approach and ability to connect clients with the right people and capabilities to deliver meaningful outcomes.

Gurjiv Singh
DIRECTOR OF ARCHITECTURE AND ENGINEERING
Gurjiv brings over two decades of expertise in solutions architecture and software engineering. He has led complex digital transformation projects for federal government departments and global enterprises, designing scalable and secure technology solutions.
Recognised for his hands-on approach, Gurjiv is deeply involved in technical design and solution delivery, ensuring high standards of performance, security, and scalability.
He excels at bridging the gap between business objectives and technical execution, ensuring innovative solutions align with strategic goals. His collaborative leadership and strategic vision drive Thinkstream’s commitment to delivering impactful solutions that meet evolving business needs.

Michelle Mitchell
Marketing Director | Thinkstream | Trusted ICT Delivery | Brand Strategy, Partnerships + Community Impact

Craig Mackie
Client Services Manager | Thinkstream | ICT Talent & Delivery Support | Government & Private Sector | Client Engagement & Capability Alignment
Craig is the Client Services Manager at Thinkstream, supporting delivery by aligning high-quality ICT talent with complex program environments.
Working across both clients and contractors, Craig plays a key role in connecting capability with opportunity, ensuring the right people are placed in the right environments to support successful outcomes. He partners closely with government and private-sector clients to understand requirements while also engaging directly with ICT professionals across the market.
His role is focused on building strong, trusted relationships on both sides, supporting clients in delivering critical programs while helping contractors find meaningful opportunities to add value.
Craig brings a practical understanding of the ICT market, with a focus on aligning technical capability, experience, and client needs to deliver both immediate impact and long-term success.
As part of Thinkstream’s professional services team, Craig contributes to a responsive and consistent delivery model, supporting recruitment and resourcing across a range of engagements.
Craig is known for his approachable style, strong communication skills, and ability to build trust with both clients and contractors, ensuring a positive, professional experience throughout the engagement.

Jason King
Project Manager | Thinkstream | ICT Delivery & Implementation | Government & Enterprise Programmes | Complex Delivery Environments
Jason is a Project Manager at Thinkstream, supporting the delivery of complex ICT and business transformation initiatives across government and enterprise environments.
He works closely with clients and delivery teams to plan, coordinate, and execute programmes in highly regulated settings, ensuring outcomes align with organisational objectives, timelines, and stakeholder expectations. His role is focused on bringing structure and clarity to complex delivery environments while maintaining strong engagement across all levels.
Jason has over 20 years’ experience across public and private sector organisations, with deep expertise in managing multi-disciplinary teams and delivering programmes across social, health, and welfare domains. He is experienced in working across agile, waterfall, and hybrid delivery models and understands the importance of balancing governance, delivery pace, and stakeholder needs.
Jason is known for his collaborative and adaptive approach, building trusted relationships and supporting teams to deliver consistent, high-quality outcomes. Jason focuses on enabling ICT delivery that performs and helping clients enhance service delivery, introduce new capabilities, and achieve meaningful results.

Julia Powl
Delivery Manager | Thinkstream | ICT Talent & Delivery Support | Government & Private Sector | Client Engagement & Capability Alignment
