Senior Active Directory Engineer

This role is four days onsite at our Seneca One Buffalo, NY location, with the flexibility to work from home one day per week

Overview:

Responsible for designing, securing, and operating Microsoft Active Directory Domain Services (AD DS) in regulated, high-availability environments. Acts as knowledge resource for and trains less experienced engineers. Completes day-to-day support activities and special projects.

Primary Responsibilities:

Enterprise Active Directory Architecture

• Proven expertise supporting large-scale, Tier‑1 identity infrastructures with strict uptime, latency, and change‑control requirements
• Strong experience with: Multi-domain and multi-forest designs aligned to business units, regions, or regulatory boundaries Forest and external trusts supporting M&A, joint ventures, and third-party integrations FSMO role placement optimized for resilience and auditability
• Advanced understanding of Active Directory–integrated DNS, split‑brain DNS, and secure name resolution models

Hybrid Identity & Microsoft Entra ID (Azure AD)

• Extensive experience integrating on-prem AD with Microsoft Entra ID in regulated financial environments
• Hands-on implementation of: Entra Connect (Cloud Sync and Traditional) Password Hash Sync, Pass-through Authentication, and Federation
• Strong experience with: Conditional Access aligned to regulatory and risk-based controls Hybrid Join, Entra ID Join, and legacy device coexistence
• Understanding of identity lifecycle controls to support joiners, movers, leavers, and separation-of-duties requirements

Security, Compliance & Risk Controls

• Expert-level knowledge of Active Directory security hardening in financial services, including: Tiered administrative model (Tier 0/1/2) Dedicated admin forests or hardened admin boundaries (where applicable) Privileged Access Workstations (PAWs) / Secure Admin Workstations
• Experience enforcing least privilege, role separation, and dual‑control models
• Deep familiarity with threats targeting financial institutions: Credential theft, Kerberoasting, Pass-the-Hash/Ticket Delegation and ACL abuse
• Hands-on experience with: Privileged Identity Management (PIM) Regular access reviews and entitlement recertification
• Strong alignment with Zero Trust and defense-in-depth identity strategies

Regulatory & Audit Readiness

• Demonstrated experience supporting audits and controls for financial regulations and frameworks, such as: SOX, GLBA, PCI DSS, SOC 2 Internal risk management and model governance requirements
• Ability to design AD environments that support: Strong logging and traceability Tamper-resistant audit logs Evidence generation for internal and external auditors

Automation & PowerShell

• Advanced PowerShell expertise for: Controlled, auditable administrative changes Automated provisioning/deprovisioning aligned to compliance workflows Identity reporting for risk, security, and audit teams
• Experience building automation that integrates with: Change management processes IAM, ticketing, and security tooling

Operations, Resilience & Recovery

• Deep experience managing: AD replication topology across data centers and regions SYSVOL (DFSR) health and recovery Latency-sensitive authentication dependencies
• Strong understanding of: AD backup, recovery, and authoritative restore procedures Identity disaster recovery scenarios with defined RTO/RPO
• Experience implementing monitoring and alerting with a focus on early risk detection

Leadership & Governance

• Acts as technical authority and escalation point for all directory and identity services
• Defines and enforces: Enterprise identity standards Secure configuration baselines Operational runbooks and procedures
• Partners closely with: Information Security and IAM teams Risk, audit, and compliance stakeholders Infrastructure, cloud, and application teams
• Mentors engineers and reviews designs from a security and risk-first perspective

Education and Experience Required:

• Bachelor's degree and a minimum of 3 years’ relevant work experience, or in lieu of a degree, a combined minimum of 7 years’ higher education and/or work experience

Education and Experience Preferred:

• Intermediate understanding of the security system development and infrastructure lifecycle and architecture, and systems design
• Proven experience with the tools utilized in assigned Cybersecurity function
• Experience translating architecture into technical requirements.
• Proficient level of critical thinking and problem solving
• Excellent written and verbal communication skills
• Proven experience collaborating with leaders to execute results.
• Prior experience seeking buy-in of others to align on processes.
• Ability to analyze and draw conclusions based on quantitative data from multiple sources.

M&T Bank is committed to fair, competitive, and market-informed pay for our employees. The pay range for this position is $97,100.00 - $161,800.00 (USD). The successful candidate’s particular combination of knowledge, skills, and experience will inform their specific compensation.

Location

Buffalo, New York, United States of America