Summary
Overview
Work History
Education
Skills
Certification
Technical Skills
Timeline
Generic

Corey Gelissen

Germantown,MD

Summary

A Versatile and accomplished IT professional with 30+ years of experience managing and delivering enterprise-level IT infrastructure, migrations, and mission-critical systems across federal, financial, and commercial sectors. Proven track record of aligning technology strategies with business objectives, modernizing legacy environments, and leading cross-functional teams in critical, security-sensitive environments. Recognized for a disciplined, solutions-oriented approach honed through military background and federal contracting expertise. Deep expertise in multi-platform environments, virtualization, cloud platforms (AWS, Azure), and ITSM best practices (ITILv4).

Overview

31
31
years of professional experience
1
1
Certification

Work History

IT Project Manager

Soft Tech Consulting Inc (Contractor to NIH)
11.2022 - Current
  • Ensured enterprise infrastructure modernization and service delivery initiatives for NIH, driving transformation of legacy environments to cloud-native platforms and enhancing stakeholder engagement.
  • Oversaw service transitions to ensure alignment with MOUs and SLDs, delivering contract-compliant outcomes that met stakeholder expectations.
  • Tracked emerging technologies and evolving client environments to proactively adjust service offerings and maintain alignment with business needs.
  • Strengthened client relationships and achieved a 99% satisfaction rate by resolving issues through structured complaint tracking and escalation processes.
  • Managed billing reports and cost projections to support annual budgeting and deliver accurate IT service quotes for upcoming projects.
  • Led planning efforts for enterprise infrastructure modernization, driving the migration of on-premises systems to AWS and Azure for improved scalability and cost-efficiency.

IT Systems Administrator

Octo Consulting Group (Contractor to NIH)
11.2020 - 11.2022
  • Supported a 500-user hybrid Windows/macOS infrastructure with 50+ virtual servers.
  • Automated OS deployments, patching, and software delivery using MECM and Jamf.
  • Spearheaded transition from Veritas NetBackup to Cohesity for streamlined cloud/on-premises backup.
  • Contributed to modernization planning and readiness for a future server and application cloud migration strategy.
  • Managed upgrading the infrastructure server applications to the latest release versions.

IT Operations Readiness Engineer

Systems Engineering Solutions Corp (Contractor to US Census Bureau)
11.2019 - 11.2020
  • Ensured architecture readiness and operational sustainability for the Decennial 2020 Census systems.
  • Delivered Tier 3 Windows/AD support during 24/7 ISR production operations.
  • Reviewed system designs for operational readiness in support of 2020 Decennial Census infrastructure.
  • Collaborated on AD account lockout issues using Splunk and PowerShell automation to reduce service disruptions.
  • Improved server hardening and patching compliance through Tanium and structured OS deployment reviews.

IT Business Systems Analyst

Soft Tech Consulting Inc (Contractor to NIH)
10.2018 - 11.2019
  • Liaison between NIH business stakeholders and IT delivery teams for hosted infrastructure services.
  • Liaised between clients and delivery teams, translating technical specifications into business solutions.
  • Developed client hosting reports and service catalogs for NIH congregate care organizations improving transparency and accountability.
  • Facilitated client needs assessments and translated requirements into technical deliverables.

IT Network Engineer

EagleBank Corp
03.2017 - 09.2018
  • Managed network and infrastructure upgrades for 25-location banking enterprise.
  • Deployed network switch upgrades across all bank locations (Cisco Catalyst 3650/3850).
  • Enhanced endpoint security with Aruba ClearPass and Stealthbits implementation.
  • Led Windows 10 image certification and deployment across the enterprise.
  • Supported the rollout of ServiceNow for IT helpdesk management and asset management functions.
  • Upgraded the mobile device management infrastructure (Blackberry Enterprise Server).

Senior Infrastructure Analyst

ATOS (formerly Xerox & CompuCom), Client: Nike, Inc.
07.2015 - 02.2017
  • Delivered global server infrastructure support for Nike’s retail and enterprise operations.
  • Provided 24/7 global infrastructure support for 9,500+ Windows servers at Nike HQ and affiliates.
  • Collaborated on a large-scale data migration and cutover project for Converse file servers, leveraging automation scripts.
  • Supported major retail server refresh ahead of Rio 2016 Olympics in Brazil.
  • Engineered new build standards using VMware, Hyper-V, and automated PowerShell scripts.

Earlier Career

Highlights
03.1994 - 06.2014
  • Held various senior technical roles supporting secure military, government, and commercial environments. Focus areas included:
  • Windows/UNIX system administration
  • Government secure messaging systems (X.400, NIPR/SIPRNet)
  • Network infrastructure design and Tier 3 operations support

Education

Diploma -

South Salem High School
Salem, OR

Skills

  • Project Management
  • Cloud Architecture & Migration (AWS, Azure)
  • Windows/Linux Server Administration
  • Virtualization: VMWare, Hyper-V, Cisco UCS
  • ITSM: ITILv4, ServiceNow, Remedy
  • Network Design & Security Compliance (NIST, FIPS, CIS)
  • Disaster Recovery & Backup (Cohesity, Veritas)
  • Scripting & Automation (PowerShell, Bash)

Certification

  • ITILv4 Foundations – AXELOS
  • Red Hat Linux Essentials – Red Hat
  • Cisco Unified Computing v5 – New Horizons
  • Tripwire Enterprise & Log Center Admin – Tripwire
  • Cohesity Platform Core Operator – Cohesity
  • Dynatrace Operations – Dynatrace
  • Oracle 8i Database Admin – Learning Tree
  • Implementing VPNs – Learning Tree
  • LDAP as Naming Service – Sun Microsystems

Technical Skills

Cloud & Virtualization
AWS, Azure, GCP, VMware vSphere, Microsoft Hyper-V, Cisco UCS, XEN

Operating Systems
Windows Server (2008–2022), Windows 10, macOS, RHEL, Solaris, HP-UX, SCO UNIX, Cisco IOS

Server & Endpoint Management
Active Directory, Group Policy, MECM (SCCM),Jamf Pro, Ivanti, Altiris, Trend Micro, Tivoli, McAfee ePO, BES

ITSM & Monitoring:
ITIL v4, ServiceNow, BMC Remedy, HEAT, ManageEngine, Dynatrace, Foglight

Networking Technologies:
Cisco Routers & Catalyst Switches, Aruba ClearPass (NAC), WAN/LAN, Distributed Architecture, NT Domains

Server Platforms

Cisco UCS, Dell PowerEdge, HP ProLiant (BL/DL Series)

Storage & Infrastructure:
Dell EMC, HP EVA, PowerVault, SAN/NAS Storage, Blade Servers

Security Tools & Frameworks

RSA, Ivanti, Tenable Nessus, Tripwire, Tripwire Log Center, NG Application Intelligence

Security & Compliance:
NIST, CIS, FIPS, Nessus, Tripwire, Ivanti, RSA, PKI, IPSEC

Directory, Messaging & Web Services

Microsoft DNS, DHCP, BIND, LDAP, X.500, Exchange, Merak Mail, IIS, Apache Tomcat, SMTP, X.400, NFS, SMB, CIFS, BlueCat, VitalQIP

Tools & Applications:
IBM Cognos, Serena tools, ArcGIS, Oracle Primavera, HP LoadRunner, WebTrends

Data Backup & Recovery

Cohesity, Veritas NetBackup

Scripting & Automation:
PowerShell, Bash, Windows Batch

Databases & Middleware:
SQL Server, Oracle

Timeline

IT Project Manager

Soft Tech Consulting Inc (Contractor to NIH)
11.2022 - Current

IT Systems Administrator

Octo Consulting Group (Contractor to NIH)
11.2020 - 11.2022

IT Operations Readiness Engineer

Systems Engineering Solutions Corp (Contractor to US Census Bureau)
11.2019 - 11.2020

IT Business Systems Analyst

Soft Tech Consulting Inc (Contractor to NIH)
10.2018 - 11.2019

IT Network Engineer

EagleBank Corp
03.2017 - 09.2018

Senior Infrastructure Analyst

ATOS (formerly Xerox & CompuCom), Client: Nike, Inc.
07.2015 - 02.2017

Earlier Career

Highlights
03.1994 - 06.2014

Diploma -

South Salem High School

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Corey Gelissen