columbus & network administrator Jobs – 34 Openings This Week

Active Directory L3 Support Engineer - NTLM, PowerShell, AD, LDAP signing, Zero Trust, CyberArk
APPTOZA INC. —Toronto, ON
- $55–$60 an hour
- Hybrid work
- Windows
Quick apply
5d
Systems Administrator, Fall 2026 (Co-op/Internship) - 8 months
BMO Financial Group —Toronto, ON
- $61,600–$113,900 a year
- Full-time
- Azure
- DevOps
- AWS
- Tuition reimbursement
- Life insurance
2d
Operator II - Customer Support Center
NRT Technology Corp. —Toronto, ON
- Full-time
- Computer Science
- Customer service
- Analysis skills
- Dental care
- Paid time off
Quick apply
Senior Deskside Support Technician
Worley —Pickering, ON
- Full-time
- Customer service
- Windows
- Microsoft Office
13d
TECHNICAL CONSULTANT
EXOCLOUD —Markham, ON
- Customer service
- Windows
- Microsoft Office
- Flexible schedule
Technical Analyst, Database
Michael Garron Hospital —Toronto, ON
- Temporary
- Azure
- Computer Science
- Windows
Technical Analyst
Michael Garron Hospital —Toronto, ON
- Full-time
- Azure
- Computer Science
- Windows
Database Architect
Scotiabank —Toronto, ON
- Computer Science
- Databases
- Bachelor's
- Tuition reimbursement
Manager Infrastructure Architecture & Automation
CAA SCO Systems & Services Inc —Thornhill, ON
- $76,400–$117,400 a year
- Hybrid work
- Azure
- Computer Science
- Engineering
- Wellness program
- Tuition reimbursement
Quick apply
Principle Experience Architect
Jonas Software —Markham, ON
- Full-time
- Hospitality
3d
Sr. Associate Consultant
The Goal Getters Associates —Toronto, ON
- Microsoft Word
- Microsoft Excel
- Oracle
Sage ERP Consultant
IWI Consulting Group —Woodstock, ON
- Computer science
- ERP systems
- Computer networking
Sage CRM Consultant
IWI Consulting Group —Woodstock, ON
- Computer science
- Computer networking
Sr Project Architect
Manawa —Toronto, ON
- Full-time
- Hybrid work
- Azure
- Computer Science
- Bachelor's
Quick apply

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Senior Systems Administrator (Storage Services)
Moneris Solutions —Toronto, ON
A workplace committed to investing in Diversity, Equity and Inclusion (DEI) through various initiatives including, employee inclusion groups (EIGs), mentorship,…
$99,121–$134,522 a year
IT Helpdesk Supervisor
Central West Specialized Developmental Services —Oakville, ON
A valid Ontario driver’s license and a vehicle. Competitive benefits program for full time and part time staff that includes extended health and dental care,…
$60,390–$72,500 a year
Quick apply

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Active Directory L3 Support Engineer - NTLM, PowerShell, AD, LDAP signing, Zero Trust, CyberArk

APPTOZA INC.
Toronto, ON

Quick apply

Job details

Fixed term contract
5 days ago

Skills

Microsoft Windows Server
Authentication
Encryption
Disaster recovery
Windows
SSL
Remote access software
LDAP
DNS
CyberArk
PowerShell
Active Directory

Full job description

Active Directory L3 Support Engineer - NTLM, PowerShell, AD, LDAP signing, Zero Trust, CyberArk

Toronto, ON - Hybrid (4 Days WFO)

6-12 Months Contract

Key Responsibilities

Deploy and configure additional domain controllers across primary and disaster recovery sites, including DC01 and DC02, to improve availability, resilience, and site-level recovery readiness.
Replace legacy Windows Server 2016 domain controllers and support platform modernization activities with minimal service disruption.
Implement production and development network segmentation to reduce lateral movement risk and align identity services with Zero Trust principles.
Maintain Active Directory health across replication, authentication, DNS integration, and Group Policy processing.

Security Hardening and Access Control

Enable Extended Protection for Authentication (EPA) and require SSL/TLS for privileged HTTP-based services such as AD CS and ADWS to reduce credential relay and man-in-the-middle exposure.
Enforce SMB signing to help prevent tampering and NTLM relay over SMB sessions.
Disable NTLMv1 and strengthen LDAP protections by enforcing LDAP signing and channel binding / LDAPS for directory communications.
Implement Kerberos armoring, restrict unconstrained delegation, tighten delegation permissions on privileged accounts, and address unknown delegation entries.
Remediate excessive privilege findings, including Admin Count issues, GPO-deployed file exposure, missing protective ACLs, and privileged accounts not enrolled in Protected Users.
Remove insecure legacy access patterns such as pre-Windows 2000 compatible group usage and administrator logon allowances through Group Policy.
Enforce stronger password and privileged account controls, including a 12-character minimum complexity baseline, password expiration where appropriate, and smartcard password rotation requirements.
Identify and remediate risky account configurations such as PASSWD_NOTREQD, password never expires, admin accounts with email usage, and missing delegation restrictions.

Group Policy, Logging, and Compliance

Harden Group Policy baselines by enforcing event audit logging, PowerShell logging, supported encryption types, remote desktop best-practice settings, and secure administrator sign-in controls.
Review and remediate LDAP signing and channel binding gaps, privileged HTTP service protection gaps, and other domain-level weak configurations identified through assessments.
Document remediation plans, implementation standards, and operational procedures to support audit readiness and ongoing compliance.
Partner with infrastructure, cybersecurity, and application teams to validate compatibility, sequence change windows, and reduce operational risk during security enforcement activities.

Required Technical Skills

Hands-on experience administering Active Directory Domain Services in multi-domain or multi-site enterprise environments.
Strong knowledge of domain controllers, replication, DNS, Group Policy, authentication flows, and disaster recovery design for AD.
Practical experience implementing Microsoft security controls such as EPA, LDAP signing, channel binding, Kerberos hardening, SMB signing, and privileged account protections.
Experience with Active Directory Certificate Services, Active Directory Web Services, Windows Server hardening, and identity-related remediation programs.
Ability to analyze and remediate privilege escalation paths, insecure account settings, and policy-based configuration weaknesses.
Proficiency with PowerShell for audit, remediation, automation, and operational reporting.
Experience planning and executing infrastructure upgrades, domain controller replacement, and controlled production changes.

Preferred Qualifications

Experience supporting regulated or highly controlled enterprise environments with strong audit, change management, and documentation expectations.
Familiarity with Zero Trust architecture, privileged access management, and identity security assessments.
Relevant Microsoft certifications in Windows Server, Active Directory, security, or identity administration are advantageous

Pay: $55.00-$60.00 per hour

Work Location: Hybrid remote in Toronto, ON (Toronto District)

Quick apply

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& network administrator jobs in columbus

Active Directory L3 Support Engineer - NTLM, PowerShell, AD, LDAP signing, Zero Trust, CyberArk

Systems Administrator, Fall 2026 (Co-op/Internship) - 8 months

Operator II - Customer Support Center

Senior Deskside Support Technician

TECHNICAL CONSULTANT

Technical Analyst, Database

Technical Analyst

Database Architect

Manager Infrastructure Architecture & Automation

Principle Experience Architect

Sr. Associate Consultant

Sage ERP Consultant

Sage CRM Consultant

Sr Project Architect

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