Senior Infrastructure Consultant

_{20th August, 2026}

Why work for Brennan?  

At Brennan, we aim to lead, not follow. One of the ways we do this is through an open diverse culture that values performance, where anyone in the team can bring new ideas to the table and see them thrive. Our people are empowered, considerate, supportive, trusting and accepting, they are the cornerstone of the business. Because of this approach, we have become the largest Australian owned systems integrator in Australia and continue to grow.  
 
Brennan offers an excellent remuneration package and benefits including:  

• A focus on health and well-being - social club, sporting teams, health checks, poker, trivia nights and more!  
• A strong culture underpinned by values that are truly lived every day  
• An environment that embraces learning and development of all employees  
• Flexibility to work in the way that brings out the best in you  
• High levels of reward and recognition for overachieving 

THE ROLE :

The Senior Infrastructure Consultant is a key member of the Cloud Practice, with a primary focus on Microsoft 365, tenant-to-tenant migrations and modern workplace transformation.

The role is responsible for designing and delivering Microsoft 365 solutions across Exchange Online, SharePoint Online, Teams, OneDrive and Microsoft Entra ID, working closely with customers, architects and project teams from discovery and assessment through to migration, cutover, validation and operational handover.

The role also provides broader infrastructure expertise across VMware, Windows Server, Active Directory, Azure and hybrid environments, including the design and implementation of virtualisation platforms and supporting infrastructure. The Senior Consultant is expected to provide technical leadership, own delivery workstreams, engage directly with customers and ensure solutions are secure, scalable, operationally ready and aligned with business requirements

ROLE RESPONSIBILITIES :

• Participate in and deliver Microsoft 365 tenant-to-tenant migration activities, including discovery, assessment, planning, preparation, migration execution and post-migration validation.
• Assist with the migration of Exchange Online mailboxes, OneDrive data, SharePoint sites and Teams between Microsoft 365 tenants.
• Perform pre-migration assessment and validation of users, mailboxes, domains, licensing, groups, applications and dependencies.
• Participating in change management, release planning, testing, production cutovers and post-implementation validation.
• Providing technical guidance and mentoring to Infrastructure Consultants and Engineers.
• Support Microsoft Entra ID identity and access configuration required for Microsoft 365 migrations, including users, groups, authentication and administrative roles.
• Support user cutover activities and provide technical assistance during migration and go-live windows.
• Contributing to pre-sales activities, technical estimates, Statements of Work, solution proposals and customer presentations where required.
• Developing technical documentation including High-Level Designs, Low-Level Designs, implementation plans, migration plans, test plans, operational procedures, runbooks and As-Built documentation.
• Participating in infrastructure assessments, discovery, facilitating workshops and technical design activities to understand customer requirements and business objectives.
• Designing and deploying virtual infrastructure environments including virtual machine provisioning, resource allocation, performance monitoring, maintenance, and administration of VMware platforms.
• Configuring, hardening, and deploying Windows Server 2022/2025 environments in accordance with organisational standards and security requirements.
• Building, designing and configuring HPE/Dell PowerEdge server platforms.
• Supporting customer engagements by gathering technical requirements and contributing to understanding business and IT objectives.
• Participating in knowledge sharing and mentoring within the engineering team.
• Supporting additional tasks aligned with the role and team objectives as required.

SKILLS/EXPERIENCE REQUIRED :

• Strong analytical and troubleshooting skills.
• Good written and verbal communication skills.
• Ability to work effectively with customers and internal technical teams.
• Ability to manage assigned tasks and deliverables independently.
• Strong attention to detail and commitment to quality.
• Ability to identify technical issues, risks and dependencies and escalate appropriately.
• Willingness to learn new technologies and adapt to changing customer environments.
• Certification in virtualisation technologies such as:

• VCP or VCF (or equivalent hands-on experience)
• Working knowledge of AD & Identity Management.
• Foundational knowledge of:
• Windows and/or Linux operating systems
• Virtualisation concepts (VMware)
• Backup & Disaster Recovery Management
• Good communication skills with the ability to work collaboratively with technical teams and stakeholders.
• Willingness to learn, adapt, and work towards advanced certifications and deeper cloud expertise.

The following certifications are desirable but not mandatory where equivalent practical experience can be demonstrated:

• VMware VCP or equivalent VMware certification.
• Microsoft Azure Fundamentals (AZ-900).
• Microsoft 365 Fundamentals (MS-900).
• Microsoft Identity and Access Administrator (SC-300).