1. DAVID G. PRESNELL
786.620.0852 • +506.8724.7714 • dgptrek@yahoo.com
SUMMARY OF QUALIFICATIONS
Network Engineering/Support ~ Communications Security ~ Systems Analysis/Administration
Highly-accomplished senior-level Network Engineer and Systems Administrator with unique background of
network management/support, vulnerability reduction, mobile communications/data security, as well as strong
inter-personal skills and expertise acquired in challenging international environments in public and private sectors.
More than 15 years of demonstrated achievements identifying critical IT issues and devising innovative solutions
that expand technical capabilities, increase mission security and reduce costs. Dedicated problem-solver and change
agent committed to acquiring and implementing newest technologies. Active Top Secret Security Clearance.
CORE COMPETENCIES
Project/Operations/Network Management • Systems/Network Analysis and Design • Systems Administration • IT
Management/Business Analysis • Strategic Planning • Information Systems Security • Network Support • Policy/
Procedure Development • Process Improvement/Automation • Problem Solving/Troubleshooting • Team Building/
Training • Communications/Relationship-Building • Customer Service • Team Leadership • Time Management
SELECT ACCOMPLISHMENTS
• Optimized achievement of operational objectives and exceeded all expectations by successfully
overseeing communications security (COMSEC) with ZERO security incidents or violations for 10
years in high risk environments for defense contractors, ensuring safe handling of protected information.
• Attained 4-fold increase in operational efficiency while saving the program hundreds of thousands of dollars
yearly over 7-year period by establishing remote site networks for counterdrug intel and communications
between USMILGRP, Tactical Analysis, Force Protection, DEA and host nations, including locations in Bolivia.
• Expanded technical capabilities, reduced vulnerability footprint and lowered costs by $2.5 MM for server/
SANs on multiple NIPR/SIPR platforms by improving WAN utilization and relocating domain services to HQ
datacenter in execution of SOUTHCOM network domain services centralization plan over entire government lifecycle.
• Strengthened information security by directing expert migration of email network to Defense Enterprise
Email (DEE) and NIPR to private IP addressing with standardized addressing scheme, achieved through
decommissioning of Microsoft Exchange Servers and onsite services with little or no downtime to user base.
• Commanded superior technical leadership and expert network administration, maintaining 100% real-time
communications infrastructure and network availability in support of Unified Response, a lifesaving relief
effort in response to earthquake in Haiti, involving immediate deployment of 11,000+ personnel from 109 nations.
PROFESSIONAL EXPERIENCE
CSGOV / CSRA, US Embassy, Costa Rica 2013 – Present
Senior Systems Administrator & Site Manager
• Served a key leadership role managing network operations, mobile communications and security for U.S. SOUTHCOM
networks in full compliance with DoD and Cyber Security Information Assurance policies and procedures.
• Heightened network performance by troubleshooting and resolving all network issues in a timely manner, as well
as overseeing installation of network hardware/software and cabling infrastructure built to DoD & DISA standards.
• Ensured operational readiness with savings of $800K through onsite technical upgrades with DoD counterparts
establishing resilient circuits that provide more efficient and consistent connectivity to enterprise operations.

2. • Provided engineering support and network administration, in addition to monitoring/maintaining routers, CISCO
switches & servers utilizing WIN2008 R2 Enterprise, AD Manager360, VMware Client and Taclane Encryption.

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PROFESSIONAL EXPERIENCE
(Continued)
• Fulfilled all C4I requirements as lead field engineer/lead technician for Office of Security Cooperation, Tactical
Analyst Team and Force Protection Detachment regarding installation/configuration/update of SAN and virtualization
design.
• Valued as trusted leader and advisor traveled to U.S. Embassies assisting with updating customer network architecture,
as well as worked with TAT to devise solutions to enhance mobile secure satellite data and voice communications.
LOCKHEED MARTIN INFORMATION SYSTEMS & GLOBAL SOLUTIONS, US Embassy, Bolivia 2011 – 2013
Senior Systems Administrator
• Upheld integrity of organizational mission by recertifying NIPR and SIPR networks (every 3 years to the present),
achieved by implementing/configuring virtualization with VMware vSphere across site network servers/services.
• Realized extremely favorable vulnerability outcome of <3% for most severe CAT I code and assured information
readiness and adjudication of USSOUTHCOM site networks in accordance with DISA STIGs with DoD IA policy.
• Heightened operational efficiency overseeing breakdown and convergence of field networks and offices to HQ at U.S.
Embassy in La Paz, including rapid closure of MILGRP, TAT and DEA components over a 6-month project period.
• Led service delivery and provided senior technical support for network and account administration at embassy sections,
including Office of Security Cooperation (MILGRP), TAT, FPD & DAO. Monitored/maintained network components.
• Developed network security policies, procedures and standards to ensure all systems comply with company objectives.
Installed all network hardware/software. Performed expert troubleshooting to identify/resolve complex network issues.
MANTECH INTERNATIONAL CORPORATION, US Embassy, Bolivia 2004 – 2011
Systems Administrator
• Cultivated productive collaborations with host nation representatives to oversee planning and execution of closure
operations moving offices/networks from the field while managing large-scale projects for MILGRP, TAT, FPD, DEA.
• Mitigated security risk and met C4I needs by assessing communication needs for all military offices. Chosen to serve
on special deployment team to migrate MS Windows 2003 Server/Exchange 2003 within U.S. SOUTHCOM AOR.
• Elevated overall performance by directing engineering plan to establish logical network architecture in alignment
with DoD IA guidelines and industry best practices, including DHCP implementation. Maintained network devices.
Additional Professional History: Managed design and build of classified and unclassified network infrastructure
for 1st IO Command U.S. Army Intelligence and Security Command (INSCOM), providing support for intelligence
activities at Abu Ghraib. Additionally served as Network Team Lead in high security environments.
EDUCATION
M.S. in Cyber Security Studies, AMERICAN PUBLIC UNIVERSITY, in progress with expected completion in 2018
B.S. in Information Technology Management, AMERICAN PUBLIC UNIVERSITY, 2016
PROFESSIONAL DEVELOPMENT
Professional Certifications: CompTIA CISSP, in progress • CompTIA Security+ CE • CompTIA Security+ •
Microsoft Certified Professional (MCP) • Microsoft Certified IT Professional (MCITP): Client, Scheduled Feb
2017 • ITIL V3 Foundation • DoD 8570.01-M Requirements/Certification • IAT - Level II • IAM - Level I
Representative Training: DoD Cyber Security Fundamentals • DoD Cyber Security Awareness • Onsite IASM
(Information Assurance Security Manager) • Onsite DoD PKI Enhanced Trusted Agent • DoD Antiterrorism
Awareness – Level I • CTIP - Combat Trafficking in Persons

4. Language Skills: Fluent in English and Spanish
Security Clearance: DoD Clearance: Active Top Secret