Security Systems Engineer

Security Systems Engineer

Join to apply for the Security Systems Engineer role at Kelser Corporation
. This full-time position is located at 43 Western Boulevard, Glastonbury, CT, and reports to the Manager, Engineering and IT Solutions.

The Security Systems Engineer (SSE) is the key resource for designing, implementing, and providing advanced support for client infrastructure within a managed services setting. The SSE handles cybersecurity, server infrastructure, network environments, cloud and hybrid cloud architectures, virtualization, and related technologies. The role requires extensive expertise in security, networking, and Windows infrastructure, ensuring effective delivery of these services to clients. Strong communication and customer service skills are essential for this client‑facing position.

If you’re an energetic professional who wants to work with a dynamic IT managed service provider, please submit your resume and cover letter to

• Support Kelser customers with project delivery, server monitoring, and administration, and pre‑sales engineering support.
• Provide service delivery via excellent communication and customer service.
• Design and implement network, server, and cloud infrastructure architecture.
• Attend and comprehend training.
• Achieve higher‑level certifications.
• Stay current with emerging technologies and products.
• Availability for off‑hours or on‑call assignments.
• Perform other duties as determined by Kelser management.

• Previous experience in an MSP or consulting role preferred.
• Advanced, hands‑on experience with security compliance (NIST, CMMC), network security best practices, security risk assessments, vulnerability assessments, penetration tests, and implementation of security controls for critical systems.
• Knowledge of VLANs, VTP, and STP.
• Windows Server and Exchange Server support, implementation, administration, and migrations.
• Active Directory administration, forest upgrades, and Group Policy management.
• Office 365 migrations, including tenant split/merge migrations.
• Microsoft Entra hybrid identity management.
• Experience with AWS, Azure, and hosted IaaS/PaaS offerings.
• Complex ESX support, implementation, and administration.
• Remote Desktop Services and RDS profile management (FSLogix).
• Intune MDM and Autopilot device deployment.
• Network security concepts and tools.
• Ability to triage and handle multiple simultaneous work streams.
• Demonstrated troubleshooting, problem‑solving, and analytical skills.
• Project documentation (diagramming, written, etc.).
• Security certifications: CISSP, CMMC RP, Cisco Security, GSEC, CompTIA Security+.
• Bachelor’s Degree or equivalent in Computer Science, Engineering, or related fields.

• Quality of project delivery.
• Quality of solution design.
• Professional development.
• Internal and external client satisfaction.

• Medical/Dental/Eye Care Insurance.
• Flexible Paid Time Off.
• Certification Support.
• Hybrid Schedule (3 days in office, 2 days remote).
• 401(k).
• Profit‑Sharing.
• Short‑Term/Long‑Term Disability Insurance.
• Free Parking.
• Life Insurance.
• Paid Holidays.
• Employee Purchase Program.
• Free Coffee.
• Collaborative Workspace.

The Kelser team works with integrity and enthusiasm to provide each client with the highest quality product and experience. We are a team of tech professionals who bring boundless enthusiasm, technical curiosity, and genuine concern for the success of our clients to each engagement. Kelser empowers each employee to make an impact every day by living our values. We value hard work and reward it with strong employee retention and development.

Kel​ser Corporation is an equal opportunity employer.