Senior Windows Systems Engineer

ABSOLUTELY NO H1S OR 3RD PARTIES.

THIS ROLE IS ONSITE 5 DAYS PER WEEK IN NEW YORK CITY.

The Senior Systems Engineer is a senior-level technical consulting role responsible for
architecting, implementing, securing, and supporting complex client environments. This role
requires deep expertise across Microsoft 365, identity management, virtualization platforms, and
enterprise infrastructure design within highly regulated industries.
The Senior Systems Engineer operates as a technical leader within the consulting
organization. The role involves designing secure environments from the ground up, leading
infrastructure migrations and modernization initiatives, troubleshooting complex issues across
identity, networking, and virtualization layers, and serving as a technical escalation point for
consulting staff.
This is a hands-on leadership role within a multi-client consulting environment requiring both
strong technical depth and the ability to guide clients toward secure and well-architected solutions.
Accountability for outcomes remains with the Senior Systems Engineer, even when work is
delegated to other resources.
KEY RESPONSIBILITIES
Identity & Access Management
 Design and implement Microsoft 365 tenant environments aligned with secure baseline
standards
 Configure and administer Microsoft Entra ID (Azure Active Directory)
 Architect and implement Conditional Access policies and authentication controls
 Design hybrid identity architectures including Password Hash Sync (PHS), Pass-through
Authentication (PTA), and federation models
 Administer and secure on-premises Active Directory environments including OU
structure and Group Policy
 Design authentication and authorization models appropriate for regulated client
environments
Email & Collaboration Security
 Configure and troubleshoot email authentication protocols including SPF, DKIM, and
DMARC
 Design and maintain Exchange Online mail flow configurations
 Implement secure sharing policies within SharePoint Online and OneDrive
 Diagnose and resolve complex mail routing and delivery issues
Endpoint & Device Management
 Configure and manage Microsoft Intune for endpoint and device management
 Implement device compliance policies and application protection policies
 Integrate device compliance with Conditional Access enforcement
 Design secure access models for managed and unmanaged devices
Infrastructure & Virtualization
 Design and support virtualization platforms such as VMware or equivalent enterprise
solutions
 Diagnose and resolve performance issues across compute, memory, storage, and
networking layers
 Implement high availability, redundancy, and resilience strategies for infrastructure
environments
 Support Windows Server environments including domain controllers, file services, and
Remote Desktop Services
Backup & Disaster Recovery
 Architect backup and recovery strategies using 3-2-1 protection principles
 Implement immutable and offsite backup protections
 Design and validate disaster recovery procedures
 Lead recovery efforts during incident response situations
Networking & Systems Troubleshooting
 Troubleshoot DNS, routing, firewall, and connectivity issues across client environments
 Maintain strong understanding of Active Directory DNS architecture including SRV
records
 Support integration with email gateways and third-party filtering platforms
 Diagnose multi-layer infrastructure issues affecting identity, networking, and application
services
Project Leadership & Client Engagement
 Lead Microsoft 365 migrations including hybrid and cutover implementations
 Plan and execute tenant onboarding and infrastructure modernization initiatives
 Serve as technical lead on client projects and consulting engagements
 Develop documentation, architecture diagrams, and technical standards
 Serve as a technical liaison between company, client stakeholders, and third-party vendors
 Develop and maintain strong client relationships, working closely with Principals and
senior leadership to support the client experience
 Deliver status updates proactively and surface issues before they reach the client — a
client should never learn about an outage or a failed migration before our company does
 Review and validate work performed by other resources before it reaches the client;
delegating a task does not transfer accountability for the outcome
Team Collaboration & Mentorship
 Serve as a technical escalation resource for Systems Engineers and consulting staff
 Mentor junior engineers and support knowledge transfer across the team
 Promote technical best practices and disciplined operational standards
 Support the continued improvement of our consulting methodologies
 Continuously expand technical expertise across both existing and emerging technologies,
sharing new findings with the broader team
JOB EXPECTATIONS
 Ability to lift and move equipment weighing up to 50 pounds.
 Remain engaged with an open client issue through resolution, including outside standard
business hours — evenings and weekends as needed — consistent with our client
service expectations and the billing bonus program.
 Adherence to the Information Security Management System (ISMS) framework:
o The ISMS consists of processes and controls to manage the firm’s data security
with a goal of protecting the confidentiality, integrity, and availability of
information assets for clients and of our firm.
o Personnel are expected to contribute continuously to the ISMS framework by:
o Reporting incidents, events, and potential threats
o Identifying weaknesses within the ISMS and reporting them
o Providing recommendations for improvement for both the security infrastructure
and related operating procedures
o Recognizing the implications of non-conformance
 This job description is not intended to cover or describe all tasks, duties, and
responsibilities that may be required, nor does this constitute an offer of employment.
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