- Company Name
- Soho Square Solutions
- Job Title
- Systems Administrator
- Job Description
-
**Job Title**
Systems Administrator (Senior Contractor)
**Role Summary**
Senior Systems Administrator will lead the design, implementation, and maintenance of enterprise email security, Microsoft Exchange, and IaaS infrastructure. The role requires hands‑on management of Cisco IronPort, Microsoft Office 365, Linux/Windows servers, and associated security controls, ensuring high availability, performance, and compliance for a financial client.
**Expectations**
- 12‑month contracted position, 4 days per week onsite commitment.
- Deliver high‑quality service with minimal downtime, supporting a senior‑level technical client.
- Proactively participate in change, incident, and project management processes.
**Key Responsibilities**
- Administer Cisco IronPort, Proofpoint, and other email security appliances, configuring SPF, DKIM, DMARC, anti‑spam, and anti‑malware policies.
- Manage Microsoft Exchange environments (Online/M365, Exchange 2016/2019/SE) and integrate with Azure Active Directory, Entra ID, and SAML/ADFS.
- Maintain Windows Server 2016/2019 infrastructure, including Active Directory, Group Policy, DNS, and Load Balancer configuration.
- Develop and maintain PowerShell scripts for automation, reporting, and configuration tasks.
- Troubleshoot, diagnose, and resolve root‑cause issues across virtual machines, vendor appliances, and server platforms.
- Implement and manage ServiceNow tickets, following established change and incident management procedures.
- Collaborate on integration projects during mergers & acquisitions, ensuring seamless interoperability.
- Produce documentation, runbooks, and knowledge‑share sessions for peers.
**Required Skills**
- 10+ years of senior systems administration experience in a complex, regulated environment.
- Deep expertise with Cisco IronPort and proofpoint security platforms.
- Proficient in Microsoft Exchange (Online, 2016/2019/SE) and Office 365; solid understanding of Azure IaaS services.
- Strong command of email security controls: SPF, DKIM, DMARC, anti‑spam, anti‑malware.
- Advanced PowerShell scripting and Linux/Windows command‑line proficiency.
- Extensive experience with Active Directory, Group Policy, DNS, Load Balancers, ADFS, Entra ID, and SAML.
- Skilled in Windows Server 2016/2019 administration and virtualization technologies.
- Proven troubleshooting, root‑cause analysis, and incident resolution skills.
- Familiarity with ServiceNow CMDB and change/incident workflows.
- Excellent verbal and written communication; capable of clear documentation and knowledge transfer.
- French language knowledge is a plus.
**Required Education & Certifications**
- Bachelor’s degree in Engineering, Computer Science, or a related field.
- 10+ years of relevant experience as a senior systems administrator.
- Certifications such as Microsoft Certified: Azure Administrator Associate, Microsoft Certified: Exchange Server, or CCNA Security (preferred, not mandatory).