The document describes several IT job roles including Java Developer, Project Manager, Data Modeler, Applications Architect, Systems Administrator, Business Analyst, Software Engineer, Technical Support Engineer, Computer Programmer, and Quality Assurance Analyst. Each role includes a brief job description, why the role is needed, and a salary range. The roles cover a variety of specialties from programming and engineering to project management and quality assurance.

4. Create, document, and implement unit test plans, scripts, and test harnesses.Create and maintain technical documentation using defined technical documentation templates. Salary Range: $60,000 to $140,000

5. Java Developer

6. Project Manager Job Description: A project manager (PM) serves as a critical link between IT team members and key individuals involved with a project to ensure its timely completion. PMs typically oversee the process and methodology that is in place, identify best practices to ensure a successful project, manage the pipeline of requirements and act as a liaison between IT and the business. The most successful project managers can help save their company time and money by ensuring that these projects stay on track.

7. Project Manager Why you need one: Poor project execution occurs when there is a breakdown in relationship management, communication, cooperation and poor problem resolution, he says. PMs get projects on track and ensure they are implemented properly and efficiently. Salary Range: $ 70,000 to $80, 000

8. Project Manager

9. Data Modeler Job Description: Performing the design work that enables production systems and applications to use data and drive business processes. They are in the business of creating data designs, defining relationships between data fields. Creating the blueprints for a design which ultimately will get physically built on a machine. Why you need one:A business's data is one of its most important assets but it must be modeled efficiently to have great value. To ensure that the applications and systems run as effectively as they can, you really need to have a good data modeler.

10. Data Modeler Salary Range: $90,000 to $130,000

11. Applications Architect Job Description: A true applications architect has a broad view and understanding of their organization's software landscape. They make sure that individual software projects adhere to the organization's application development methodology and parameters. They act both as consultants to developers and as architecture cops. Applications architects are also senior IT professionals who perform a very specialized job, so they are in high demand because there aren't many qualified ones.

12. Applications Architect Why you need one: An applications architect steers a project from beginning to end and makes sure it fits with the organization's technology infrastructure and business strategy. Typically, applications architects are needed by large organizations with a broad and diverse set of applications that need to be integrated and with a lot of new application development projects, experts say. Salary Range: $91,400 to $130,000

13. Applications Architect

14. Systems Administrator Job Description: Systems administrators install, upgrade, monitor and maintain software and hardware to keep IT operations running smoothly. They often do data backup and recovery. In small IT departments, they are jacks-of-all-trades. Very large organizations can have dozens of systems administrators, each focused on specific areas. Things they typically maintain include operating systems, business applications, mid-range server hardware, local and wide area network hardware and software, security tools, Web servers, e-mail systems and PCs.

15. Systems Administrator Why you need one: Systems administrators are experts in the nuts and bolts of the company's IT engine, doing mundane but essential tasks every day to prevent problems and improve systems' performance. When something does break, they do early-stage diagnostics. They also must stay on top of the fast and constant technology changes affecting the company's systems, and as such are repositories of granular and critical knowledge. Salary Range: $65,000 to $85,000

16. Systems Administrator

17. Business Analyst Job Description: The business analyst's job is a true midfield position - they work with client and company, helping clients develop IT solutions to further their business goals. It's a project-based role that begins with defining a customer's needs and creating a project plan to design IT solutions to meet these needs. A team is assembled, a schedule set and the business analyst oversees the project. Why you need one: A good business analyst is able to create a solution to a particular business problem and act as a bridge to the technologists who can make it happen.

18. Business Analyst Salary Range:$74,000-$87,000

19. Software Engineer Job Description: Responsible for the design and implementation of a variety of software solutions. They might be involved in the design and testing of anything from computers games and business applications, to operating systems and advanced software for the control of highly technical hardware and equipment. Once the system had been fully designed software engineers then test, debug, and maintain the systems. Why you need one: They analyzes user requirements, working with computer coding languages. Integrating existing software products and getting incompatible platforms to work together, creating technical specifications and test plans and etc. Salary Range: $50,000 to $61,000

20. SoftwareEngineer

21. Technical Support Engineer Job Description: These are the professional troubleshooters - the SAS of the IT world. Sales engineers as they are also known, use their technical knowledge of a product to sell it to a client, explain how it works or adjust the product to fit a client's specific needs. Why you need one: The day-to-day activities of a technical support engineer can be compared to that of a salesperson in that they must work to sell the product to a client, negotiate the price and finish the sale. Sometimes they work with another salesperson and act as the expert explaining the technical benefits of the product. Once the product is sold, the support engineer will then advise clients on how to overcome any problems or difficulties with the product if they should arise.

22. Technical Support Engineer Salary Range: $43,000 to $53,000

23. Computer Programmer Job Description: Are responsible for creating the programs essential for computer operation. They take the software programs and change them into a format that the machine can recognize. These individuals also perform a number of other critical functions within this job category. They deal with programs when they need to be repaired, changed, or added to another program already in place. In addition, the programmer may have to aid in identifying a customer’s needs when using the software. Why you need one: They may help to troubleshoot potential problems and in the design phase of many software programs. Aided by programs that help to change software into the computer’s language, programmers can now write more specific parts of the program.

24. Computer Programmer Their work helps computers and systems work more smoothly without problems and at a more efficient level. In addition, programmers also write programs for educational software, desktop publishing, business and personnel finances and computer games. Salary Range: $69,620 to $111,450

25. Computer Programmer

26. Quality Assurance Analyst Job Description: The quality assurance (QA) department in an organization works to ensure that all products meet customer specifications. QA analysts work to determine the root cause of defects to prevent recurrence of the issues and quality problems. The quality assurance analyst uses data collected from inspections and testing procedures to determine the cause of quality issues.

27. Quality Assurance Analyst Why you need one: Reviews and analyzes quality inspection data to find specific types of quality problems the department or company is experiencing. The analysis provides information on the particular defects that can be addressed. A quality analyst writes and implements test and inspection procedures to obtain the defect information needed for analysis, and report findings from test and inspection data to management. Salary Range: $77,000 to $81,000

28. Quality Assurance Analyst