Jeffrey Sims
Curtis Bay,MD
Summary
Motivated and accomplished Senior Leader in Information Technology with over 20 years of extensive experience in comprehensive problem solving, systems administration, and project management. Accomplished leader with effective collaboration skills, team building capabilities and leadership in diverse and multifaceted operations. Proven and demonstrated knowledge of high-profile processes and policies to streamline operations. Focused high performer driving effective communications to drive fluid and streamlined operations.
Professional system administrator with expertise in managing complex IT environments. Adept at ensuring system availability, performance, and security while supporting team collaboration and achieving results. Skilled in server maintenance, and troubleshooting. Reliable, adaptable, and focused on delivering impactful solutions.
Overview
22
22
years of professional experience
1
1
Certification
Work History
Senior Systems Administrator
LevelBlue
08.2024 - 03.2026
- As Team Lead coordinated Daily Status updates of current Projects enhancing capabilities provided to Customers.
- Maintained Multifactor Authentication Software (RSA) that allowed for secure connections of users.
- Monthly server patching on multiple networks ensuring compliance with mandated Security Requirements.
- Assisted with On-Site installations and upgrades of server Hardware to multiple sites as needed.
Senior Systems Administrator
AT&T BUSINESS – PUBLIC SAFETY
Columbia, MD
12.2015 - 07.2024
- Oversaw multiple issues and concerns with regard to technical support for government agencies with DHS mandated email and DNS protections.
- Gathered research and information with regard to new products and technologies to meet and exceed business goals and objectives for AT&T.
- Authored and edited standard operating procedures to better streamline operations and keep communications relevant as needed.
- Successfully installed and configured a comprehensive Patch Management System as well as Veritas NetBackup on four separate networks not connected to the internet resulting in a reduction of time required to keep servers and workstations within security compliance by 50%.
Systems Administrator
GENERAL DYNAMICS INFORMATION TECHNOLOGY
Ft Meade, MD
12.2013 - 12.2015
- Ensured proper system administration support for multiple classified networks with 300+ users locally and 600+ users in remote locations.
- Oversaw comprehensive system administration support including network backup, disaster recovery, and infrastructure administration.
- Successfully worked with a diverse and multifaceted client group to validate user requirements as changes were made.
- Created and implemented laptop images for senior leadership to drive mobile coordination of time sensitive tasks.
- Utilized Security Content Automation Protocol to evaluate and validate net worthiness of laptops including troubleshooting issues and concerns until reconciliation.
- Cemented oversight and creation of scripts utilizing PowerShell to better automate manual tasks including retrieving workstation information and verification of logged on users.
- Effectively upgraded servers to meet and exceed security compliance as needed.
Information Assurance Specialist
GENERAL DYNAMICS INFORMATION TECHNOLOGY
Fort Meade, MD
03.2012 - 12.2013
- Oversaw comprehensive information assurance support and system administration to better streamline operations.
- Successfully ran security scans to troubleshoot comprehensive issues and concerns until reconciliation.
- Installed complex encryption software on multiple laptops used for deployment.
Systems Administrator
GENERAL DYNAMICS INFORMATION TECHNOLOGY
Darmstadt, Germany
01.2012 - 01.2013
- Ensured comprehensive Microsoft Exchange Administrative support including systems administration as needed.
- Provided world class customer and client service, effectively installing systems and routine maintenance to streamline operations.
- Monitored and tracked multiple classified networks at any given time.
- Provided comprehensive 24/7 support as needed.
Exchange Administrator
Darmstadt, Germany
01.2010 - 01.2012
Systems Administrator
Darmstadt, Germany
01.2008 - 01.2010
Systems Administrator
Heidelberg, Germany
01.2004 - 01.2008
Education
High School Diploma -
Penns Valley Area High School
Skills
- Windows Server administration
- Backup and recovery
- Patch management
- Active Directory management
- PowerShell
- Program installations
- System upgrades
- VMware
- Red Hat Linux
Clearance
Active TS/SCI w/CI Polygraph
Certification
- Microsoft Certified Systems Administrator
- Security+
- MCTS Windows Server 2008
CORE COMPETENCIES
Communications | Relationship Building | Team Leadership | Interpersonal Skills | Policies and Procedures | Data Analysis | Customer Service | Strategic Vision | Systems Administration | Root Cause Analysis | Active Directory | Infrastructure Reliability | Complex Problem Solving
Timeline
Senior Systems Administrator
LevelBlue
08.2024 - 03.2026
Senior Systems Administrator
AT&T BUSINESS – PUBLIC SAFETY
12.2015 - 07.2024
Systems Administrator
GENERAL DYNAMICS INFORMATION TECHNOLOGY
12.2013 - 12.2015
Information Assurance Specialist
GENERAL DYNAMICS INFORMATION TECHNOLOGY
03.2012 - 12.2013
Systems Administrator
GENERAL DYNAMICS INFORMATION TECHNOLOGY
01.2012 - 01.2013
Exchange Administrator
01.2010 - 01.2012
Systems Administrator
01.2008 - 01.2010
Systems Administrator
01.2004 - 01.2008
High School Diploma -
Penns Valley Area High School