Windows Administration Microsoft Exchange Server Freelancers

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Maynard van Gend

Maynard van Gend Agency Contractor


South Africa - Tests: 7

For the past 15 years I have acquired the required skills to provide design, implementation and maintenance services to a vast variety of clients. This includes design of international AD structures for large corporate companies all the way down to small business server migrations for small business ventures here in South Africa. My motto is: If it's been done right the first time, you don't need to come back for seconds. My experience includes, but isn't limited to: Windows Server 2008, 2003, 2000, NT4; Sonicwall Product Range; Windows 7, Vista, Windows XP,Windows 2000; Linux; Siemens VoIP Equipment, ... the list goes on.

$50.00 /hr
1,000 hours

Gustavo Folga

Gustavo Folga Agency Contractor

AWS Certified Solutions Architect, Linux and Exchange Server expert

Uruguay - Tests: 5 - Portfolio: 3

IT Professional with 12 years of experience with Linux & Windows. cloud platforms: AWS virtualization: vSphere, Xen, KVM, Hyper-v web servers: Apache, nginx, IIS vpns: openSWAN, pptpd, OpenVPN, vpnc panels: zpanel, cPanel, virtualmin mail servers: sendmail, postfix monitoring: nagios, cacti automation: puppet dbs: mysql, MSSQL Directory Services: Active Directory, OpenLDAP Messaging: Exchange 2003/2007/2010/2013 Backup: Backup Exec, NetBackup Firewalling: Fortigate,

$45.00 /hr
223 hours

Muhammad Kamran

Sharepoint/C#/VB.NET/ASP.NET MVC/Magento Developer

Australia - Tests: 2 - Portfolio: 10

• Senior Software Engineer with 9+ years of experience in design, development and delivery of innovative and scalable Microsoft centric web solutions. • Extensive experience of developing web based enterprise applications using ASP.NET Webforms, ASP.NET MVC, AJAX, Javascript, JQuery, HTML, CSS, XML and SQL Server. • Over 3+ years of Experience in Installing, Configuring, Administrating, Maintaining and Troubleshooting Microsoft Office SharePoint Server (MOSS) 2007. • Extensive experience of developing multithreaded middleware components. • Extensive experience in Developing and building WebParts using SharePoint object model. Highly skilled with object oriented design patterns and architectures. • Strong knowledge of Microsoft technologies including MOSS 2007, .NET, AJAX, ASP.NET Webforms, ASP.NET MVC, WCF, Entity Framework and SQLSever. • With over 5 years of working with U.S based clients, successfully delivered 10+ ASP.NET web applications including a product platform for an on-demand software company. • Worked through all the phases of Software Development Life Cycle (SDLC) including Requirements Gathering, Analysis, Design, Development, Testing, Production and Post-production Support. • More than 3 years of experience in developing custom extensions for Magento Commerece.

$33.33 /hr
1,928 hours

Christos Loizou

Senior System/Network Engineer

Cyprus - Tests: 4

For 6 years now i am working as a a Senior System Enginner at a professional services organization deploying and desigining Windows/Unix environments. I have extensive work experience in Microsoft Windows Technologies and also Cisco Technologies. Currently I am looking for extra work in order to extend my passion that is deploying new systems and help people getting the most of new technologies. My key competencies include, but not limited to • Excellent skills in overall Microsoft technologies (Domain Controller, Exchange 2007/2010 Server, Lync Server , SBS 2011 • Excellent skills in virtualization platform (Hyper-V, Vmware). • Excellent skills in setup, configuration, troubleshooting and maintenance of cisco firewalls,routers • Excellent skill setting up and troubleshooting Microsoft TMG for proxy services. • Fast learner, ability to adopt existing and emerging technologies quickly and ability to work under pressure. Besides these skills implementing and desigining any envrironment is my passion. I love seeing something that was implemented by be working perfectly and the customer being satisfied using that technology.

$44.44 /hr
34 hours

Noah Stahl

Noah Stahl

Cloud/Datacenter Integration and Automation Professional

United States - Tests: 5 - Portfolio: 1

I focus on the elements of the modern IT environment: public and private cloud infrastructure, integrated datacenter management, and automating IT processes. My favorite projects involve complex challenges where an effective solution brings tangible payoff to the business, and hopefully makes life in the office a little easier too. My deepest skill set is in the Microsoft datacenter and cloud stack: Windows Server, System Center 2012 (with emphasis on Orchestrator), Windows Azure (PaaS and IaaS), and PowerShell. That said, I've been fortunate to have had experience across a variety of industries and technologies, having completed successful projects ranging from software development to network security to storage system optimization. Over time my experience and received feedback has suggested a unique interest and talent for integration and architecture of systems involving multiple layers and software/hardware components. We live in an exciting time where seamless integrated solutions are becoming a realistic expectation. Looking forward to working together!

$120.00 /hr
0 hours

Sergey K.

Sergey K. Agency Contractor

Microsoft Systems Expert, IT Architect

Canada - Tests: 18

I work professionally in IT since 1996 mostly in Microsoft area, in about 2000 started with VMware workstation version1. Since then quite heavily working with virtualization (VMware and Hyper-V mainly). Hundreds of times performed various roles such as project management, team lead, technical planning and consultancy, pre-sale engineering, hands-on experience; those are perhaps small number of types of work I have done. Planned, installed and maintained various virtualization solutions running VMware (VMserver, ESXi, ESX 3.5-4.1, VSphere 5), Hyper-V. Implemented storage solution based on Open Source storage software, including clustering and replication. Among huge list of knowledge areas - planned, configured, installed, upgraded, rescued hundreds of failed Exchange servers, I'm an EXPERT in messaging environment covering all possible aspects of email security and delivery. Windows domains configuration, upgrade, migration, consolidation, co-existence in various small, medium-sized, enterprise organizations (6300 users). * Systems backup procedures, disaster recovery scenarios planning and deployment. * Microsoft Windows Server 3.51 - 2012 R2 * AD * ADFS * DirSync / WAADS * ISA & TMG * IIS, WSUS, SQL, BlackBerry and similar 2/3 tier systems * Terminal Services / RDS * Hyper-V 2008 - 2012 R2 * Exchange 4.0, 5.0, 5.5, 2000, 2003, 2007, 2010, 2013 * Office365 / Azure * Redhat/CentOS, Debian, Ubuntu * Antivirus - Symantec, CA, Trend-Micro, Kaspersky, McAfee * Storage - HP Lefthand 4300, IBM DS3200. * VMware / ESXi 3.5 - 5.5 / vCenter Managed and implemented various Physical-to-Virtual migrations based on the client's needs and requests. Managed, installed, configured various Linux type systems, RedHat Enterprise servers, CentOS, Fedora, Debian-based, Ubuntu. Being involved heavily in to the anti-spam, anti-virus and other security solutions allows me to expand my knowledge with different security implementations of those solutions by various companies like Symantec, IronPort, CheckPoint e.t.c Experience includes planning, installing, upgrading, managing and tuning various security appliances which aim to protect the network and users from spam, viruses, malware and other security risks. The short list of products I was involved with includes but not limited to Symantec Mail Security, Alteon, Connectra, Imperva, IronPort Anti-Spam (M and C series). Network security assessments, servers hardening. Heavily involved with Office365 and Azure lately. Performed several migrations including setting up Hybrid config. The biggest migration, for which I have replaced ADFS/DirSync/Exchange 2013 Hybrid infrastructure was 1200 users. I always try to understand the infrastructure prior to implementing any fixes, even the simplest one. In majority of the cases I always provide a significant improvement suggestion. I provide per-incident as well as long-term on-going support. Cooperation with MSPs and assistance in on-going or complex projects. ... And the picture is outdated. I'm bald now. Located in GMT-7 time zone. Alberta, Canada.

$55.56 /hr
1,106 hours

Serhiy Pokrovskyy

Serhiy Pokrovskyy Agency Contractor

Expert in Ruby on Rails, C#, .NET, PostgreSQL, MySQL - 8 years exp.

Ukraine - Tests: 2 - Portfolio: 22

Started as a freelancer programmer, I've quickly grown to highly qualified and valued developer at ELEKS Software where I co-worked with world-famous companies and enterprise products such as SAP, Microsoft Dynamics and other, was a team leader and later a project manager of a growing real-estate management project. I have widely distributed and highly rated professional skills in variety of Informational technologies and other areas. In 2010 I've founded an Internet start-up - a new technology in Internet advertising. Now after my company is growing fine, I'm looking for some interesting work to do to feed my hungry developer's brain. In 2012 I've founded an outsourcing company, Synnergia Solutions, and working now on growing my development resources with highly qualified developers to tightly co-work on lots of interesting projects.

$150.00 /hr
4,170 hours

Oleg S.

Oleg S. Agency Contractor

Architect / Team Lead / Lead Developer

Russia - Tests: 29 - Portfolio: 24

Over the last 15+ years I was developing desktop and web applications using WPF, Silverlight, Windows Forms, .NET Framework, Qt, ASP.NET MVC, AJAX, HTML and web solutions using WCF, ASP.NET Web API, Windows Sockets, .NET Remoting, RIA Services. The most solutions composed as Multi-Tier Applications with some RDBMS as the back-end. I have expert level in database design and working with such RDBMS as MS SQL Server / SQL Compact Edition, Oracle, MySQL. In addition, I have very wide experience in database model design using Entity Framework (database-first, model-first, code-first) and NHibernate. My core competencies are: ★ Solutions Investigation and Analysis from the scratch including User-Stories and Precedence Diagrams writing and translation them to SRS; ★ Software Architecture design and development including UML modelling (Class Diagrams, Component Diagrams, Activity Diagrams, State Machine Diagrams, Use-Case Diagrams and Sequence Diagrams); ★ Desktop Applications development including front-end development, business-logic development, GUI development using WPF, Silverlight (including Microsoft Blend) and cross-platform GUI applications for Windows and Mac OS X using Qt+QML; ★ Web Applications development with ASP.NET MVC technologies stack, including both server-logic development and rich and responsive UI development using HTML5/CSS3, jQuery, KnockoutJS, Twitter Bootstrap, WrapBootstrap, FlatUI and other UI libraries; I have expert level in data-driven client-server applications development using Entity Framework, LINQ, ADO.NET and WCF. I always build my applications architecture following such patterns and practices as GRASP, SOLID, Design Patterns (GoF), TDD. I am crazy about UI/UX design and development. I have solid background in UI/UX prototyping using WireframeSketcher, Balsamiq. I developed many GUI applications using view-presentation separating patterns such as MVVM, MVC and MVP (with different variations like Supervising Controller, Passive View etc.). I am expert in building composite applications using Microsoft PRISM - the most impressive framework for building modular applications. Last 6+ years I loved to design Web Application using ASP.NET MVC. I have very wide experience in methodologies and practices of building reliable and maintainable web solutions using the latest Microsoft technologies including Cloud-based Web Solutions. I have rich experience in Amazon Web Services (AWS), S3 and EC2 and Windows Azure including SQL Azure database design and optimization. I have reach experience (1-5 years) in the following areas: ✓ Windows Azure Mobile Services (both .NET and JavaScript backend); ✓ Windows Azure Table Services (Blob, Table); ✓ Windows Azure Media Services (streaming video + format encoding jobs); ✓ Windows Azure SQL ServerWindows Azure Active Directory; ✓ KnockoutJS; ✓ jQuery; ✓ Twitter Bootstrap; ✓ Responsive Web UI building (mobile & desktop devices adapted); ✓ Microsoft Prism (formerly known as CAL - Composite Application Library); ✓ Entity Framework (including detached entities model implementation); ✓ WCF including RESTful and JSON services; ✓ ASP.NET WebAPI; ✓ Database development and optimization including Microsoft SQL/T-SQL, Oracle PL/SQL; ✓ Windows Sockets (WinSock, including asynchronous sockets programming); ✓ Good knowledge of the TCP/IP protocol stack; ✓ Web Services including REST protocol stack design; ✓ XML, XQuery, XSLT, XML Schemas, Serialization (XML, Binary, SOAP); ✓ UML design and prototyping; ✓ Microsoft Enterprise Library for .NET; ✓ SCSF (Smart Client Software Factory); ✓ Java 2 SE, Java Swing, Java AWT; ✓ NLog, log4net, LogEntries, PaperTrail;

$50.00 /hr
4,857 hours

Sukhvinder Singh

Sukhvinder Singh Agency Contractor

Dynamics CRM Enterprise Solution Architect

India - Tests: 8 - Portfolio: 24

Sukhvinder Singh is 100% focused on Microsoft Dynamics CRM. Having realized the potential of Dynamics CRM back in 2008, he has worked extensively on all versions starting from 4.0. He keeps himself updated by interacting with the top stakeholders at Microsoft and attending Microsoft convergence meetings worldwide. He believes and has demonstrated that the efficiency and effectiveness of a majority of businesses can be increased significantly by making the most of Dynamics CRM. He has helped clients ranging from small organizations with a few users to large enterprises with hundreds of users. . As the Chief Solution Architect and CEO of De Facto Infotech, Sukhvinder has prepared a team that has become a Microsoft certified partner by delivering consistent, high-quality and unparalleled Dynamics CRM solutions. This has led to De Facto becoming a preferred overseas Dynamics CRM partners for many US companies. As a Solution Architect, his primary area of expertise are: • Requirements Modeling • Enterprise Architecture Modeling • Business Process Modeling • Conceptual Data Modeling • Logical Data Modeling • Physical Data Modeling • Object Oriented Modeling At this time, he is very excited about a PSA that he is developing. The vision behind developing the PSA was to provide users with features that are not present in the PSAs currently on the market. He believes that the new PSA has the potential to increase productivity by over 25%. Soon, he will be sending invitation to a very selected group of people to try the PSA. Believing is sharing knowledge, Sukhvinder likes when people approach him to discover and discuss the many ways in which Dynamics CRM can help their businesses.

$50.00 /hr
19,288 hours

Awais Munir

Awais Munir Agency Contractor

Senior Software Architect (.NET)

Pakistan - Tests: 9 - Portfolio: 13

I am here to server YOUR INDIVIDUAL/BUSINESS NEEDS in order to reach my GOALS. I build end-to-end business solutions and/or minimum viable products (MVPs) for startups and established businesses using C#.NET platform. I handle B2B, e-commerce and B2C systems and products. I provided end-to-end solution development, deployment & maintenance services. With over 7 years of software engineering experience & 3.6+ K of upwork hours, I have been designing and developing SME, B2B and consumer-facing solutions to business problems. Based on a solid B.Sc. Software Engineering with Hons, I had exposure to the full stack of Microsoft .NET suite of technologies such as C#, VB.NET, .NEt Framework (2.0, 3.5, 4.0, 4.5) ASP.NET, ASP.NET AJAX, ASP.NET MVC, ASP.NET Web API, WCF, WCF ODATA, Web Services, Windows Services, Nodejs, XML, JSON, REST, SOAP, and Databases such SQL Server (SSRS, DB, SPs), MySQL, Derby, Oracle, MongoDB, and UI technologies such as HTML5, CSS, JavaScript, jQuery, Twitter Bootstrap and configuration on Windows Servers (2003, 2003R2, 2008, 2008R2, 2012), IIS (6,7,7.5,8), Winforms and WPF apps development, Windows MSI and EXE installer development using Advanced Installer and InstallShield, Azure VM management, RDP/Remote Access, Ubuntu and SSH using WinSCP and Putty, Azure (Azure DB, Azure management portal) and source control such as GIT (,, SVN and TFS (TFS Online included) along with Visual Studio Online hands-on experience. I have extensive experience of Asynchronous programming, SignalR, CORS, websockets, multi-threading, Parallel.Invoke, Task Parallel Library, nuget, database design, partitioning, indexing and optimization, legacy code learning & refactoring, code conversion, n-tier architecture, ORM such as Dapper and Entity Framework, and 3rd party control suites such as Telerik & DevXpress. Desktop portfolio items can be showcased on request and relevant portfolio website can be shared. Being an individual, full-time freelancer, I work usually during US EST or US CST time zone but based on project requirements can adjust to your time zone if needed. I possess exceptional English language written and spoken skills. I have excellent availability on skype during work times. My suggestions for your project to run successfully: 1. Use source control for version management 2. Use Task tracker/bug tracker to efficiently manage the milestones and deadlines 3. Communicate expectations before the project begins I have complete command over Microsoft Office Tools. I have extensive experience with 3rd party APIs such as: ★ TFS, GIT, SVN, Tortoise SVN, Tortoise GIT,, ★ Web APP deployment on IIS, windows server administration ★ National Hurricane, Weather Api ★ Twitter API, ★ Google API, ★ Odata, ★ OAuth, ★ Telerik Rad Controls for ASP.NET AJAX, ★ Telerik RAD Controls for WPF, ★ Telerik RAD Controls for Winforms, ★ DevXpress/DExperience for Web and Winforms, ★ Infragistics. ★ Aspose Cells for .NET ★ ZAP Proxy Security Analysis Framework (OWASP ZAP) ★ ZAP API ★ Fiddler for Windows, Fiddler .NET API ★ Microsoft Excel Interop ★ Microsoft Word Interop ★ Microsoft Access Interop ★ MySQL Connector for .NET ★ Microsoft SQL Server 2000/2005/2008/2008 R2 ★ Microsoft SQL Server Compact 3.5 & 4.0 ★ Windows Communication Foundation (WCF Services) ★ Microsoft Entity Framework 4.x/ADO.NET Entity Framework ★ LINQ ★ Telerik OpenAcces ORM (Database First, Model First) ★ Windows Presentation Foundation (WPF) ★ Login Authentication/Encryption ★ Message Encryption & Message Security ★ Secure Communication & Messaging ★ MCPD Validation ★ -------------------------- -Transcript ID: 919633 -Access Code: 11111985 I have worked with enterprise grade software systems that are composed of ★ multiple tiers and multiple layers, ★ distributed client-server applications that use ★ extensive remorting and RMI, ★ multi-threading, ★ memory management and exception handling, ★ developed applications that use Smart Cards and biometric devices, finger print readers and scanners and their ★ SDKs for authentication and security, ★ developed applications that use RSA key exchange, and ★ use encryption such as Rijandial and RC4 for encrypted message and file transfer. I have lead project as project lead guiding each stages from requirements gathering to system design, integration & quality assurance to deliver functional, usable and quality products. I have defined processes for maintaining quality of code, over life cycle of application development and have been a guiding mentor to my developers utilizing my experience in software development and best practices.

$33.33 /hr
3,692 hours