6 Recommended Career Change Destinations Outside SIer! Reasons for Leaving and Tips for a Successful Job Change

“I want to escape a life of constant overtime” “I want to take on more upstream processes” — if you’re struggling to find the right place to transfer from a SIer, you’re not alone.

In conclusion, the recommended destinations when changing jobs from a SIer are as follows.

By transferring to one of the above, you may be able to escape your current difficult daily life and potentially aim for further career advancement.

In this article, we will explain recommended career change destinations for those who want to leave a SIer. We will also explain in detail the skills you can leverage, precautions when changing jobs, and key points, so please read to the end.

6 Recommended Career Change Destinations from SIer

First, we will explain six recommended career change destinations when leaving a SIer. This time, we have picked up job types that differ from SIer, rather than transferring from SIer to SIer.

At SIers, the trigger for a career change is often a negative reason — heavy workload, stress, or mental strain in a harsh work environment. For those who want to break free from their current environment and find a setting that better suits their aspirations, please check the options below.

Web Engineer

Web engineers are professionals who design, develop, operate, and maintain websites, e-commerce sites, web applications, and more. Compared to SIers — which often handle large-scale projects based on client requirements from design through implementation — web engineers more frequently work on relatively smaller-scale projects.

Additionally, SIers often outsource work to subcontractors and focus primarily on project management, so if you want to be more deeply involved in hands-on system development, we recommend pursuing an engineering role.

There are many types of engineers — infrastructure, systems, and more — but web engineers primarily work on designing and developing websites and applications. There is a great sense of fulfillment in seeing your ideas adopted, receiving user feedback, and improving the product based on that feedback.

Required Skills for Web Engineers

Web engineers are required to have the following skills.

Especially at venture-stage web companies where know-how and experience are limited, professionals with practical experience and strong programming skills are highly valued.

Who Should Consider Transitioning to Web Engineering

Web engineering uses agile development — a methodology based on iterative implementation and testing in small increments. Since the pace of project progress is faster than at SIers, this is recommended for people who enjoy taking on new challenges and can work efficiently.

Additionally, since SIers often focus on project management without direct involvement in development, it is also recommended for those who love programming and want to be involved in development work.

However, please be aware that the web industry is a low-margin, high-volume sector and does not always have abundant resources, so salaries may be lower than at SIers. If that is acceptable to you, transitioning to web engineering — where your SIer experience can be a strong asset — has a very high chance of success.

In-house SE

An in-house SE is a professional who handles system construction, operation, and maintenance for their own company. Their work extends across a wide range of areas, including server and network infrastructure used internally, performance improvement initiatives, operational efficiency enhancements, and security measures. In-house SEs are also often expected to drive digital transformation (DX), requiring broad IT knowledge.

In-house SE is a popular and highly competitive role due to the absence of client-site assignments. To successfully make the transition, it is recommended to use a recruitment agency that can introduce you to openings where your skills and career background are likely to result in a strong hiring match.

Required Skills for In-house SE

The skills required when transitioning to an in-house SE role are as follows.

Development skills are essential, as system development is part of the role. Since you will also be responsible for operating and maintaining internal systems, experience in preventing issues proactively or resolving them when they arise will be directly applicable as an in-house SE.

Furthermore, because in-house SEs must fund system design and outsourcing costs from a fixed budget, budget management skills are also important. Communication skills are equally critical, as in-house SEs frequently interact with employees to discuss what kind of systems should be implemented.

Who Should Consider Transitioning to In-house SE

In-house SE is a recommended career for people with the following characteristics.

In-house SEs are involved in developing and operating their company’s own systems. While technical skills are obviously necessary, they must also have a thorough understanding of the purpose and strategy behind the systems being introduced. For this reason, those who are also interested in management and business strategy are well-suited to the in-house SE role.

Additionally, since outsourcing may be necessary when internal resources are limited, project management skills and communication abilities are also required.

This role is also well-suited for those who are tired of chasing deadlines that shift with the progress of external projects, or who want to work in a healthier, more stable environment.

SES

SES stands for “System Engineering Service” — a business model in which a company dispatches its own employees to work on other companies’ projects. Rather than building systems in-house, SES companies provide workforce solutions to clients on request.

SES is often confused with staffing (temporary agency work), but there is a key difference: in SES, the engineer has an employment contract with the SES company, while in staffing, the contract is with the staffing agency. In SES, the authority to direct the engineer’s work lies with the SES company, whereas in staffing, that authority is delegated to the client company.

Required Skills for SES Engineers

The skills required for SES engineers are as follows.

Since you are dispatched as a technical professional, system development skills are essential. Because the development technologies and knowledge required vary by assignment, continuous skill-building is expected. Additionally, since you will be working at client companies to perform system development, communication skills, general business etiquette, and professionalism are also essential.

It is worth noting that while SIer roles require management skills because delivering a finished product is the goal, SES roles do not demand schedule management skills in the same way.

Who Should Consider Transitioning to SES

Those who are well-suited for a transition to SES are as follows.

Above all, what is required of SES engineers is system development expertise. Client companies typically reach out because they are short-staffed, meaning technical competence is non-negotiable. As such, SES is well-suited for those who proactively absorb the latest technologies and have the drive to acquire skills in areas they have not yet worked with.

Freelance SE

Another option is transitioning from a SIer to a freelance SE. In today’s increasingly diverse work environment, it is not uncommon for SEs to work as freelancers. In recent years, freelance agents and crowdsourcing platforms have made it much easier to find projects.

You will take on tasks that were previously handled by your employer — such as sales, project acquisition, and the various administrative tasks that come with it — which adds complexity, but in return, you can aim for higher income and gain more freedom over your time.

However, going freelance means supporting yourself entirely on your own, which carries significant risk, making it a bolder choice than a conventional job change. For this reason, those considering freelancing should think it through carefully before making the decision.

Required Skills for Freelance SEs

The skills required to become a freelance SE are as follows.

Because freelance SEs handle everything on their own — from contract negotiation and project acquisition to system development and delivery, self-management skills are essential. The ability to stay disciplined without a supervisor watching over you is equally important.

Of course, communication skills for interacting with client companies and building trust, as well as programming skills, are also necessary. In particular, programming proficiency directly impacts the scale of systems you can take on, and ultimately your annual income, making it a critical factor.

Who Should Consider Going Freelance

The following types of people are well-suited for transitioning to freelance SE work.

As a freelancer, you will be responsible for acquiring your own projects and managing your own schedule, giving you far greater autonomy than when working as a salaried employee. For this reason, it is recommended for those who want to feel the sense of ownership and fulfillment that comes from driving projects forward themselves.

Additionally, since there is a strong likelihood of earning more than when employed, freelancing is also a great option for those aiming to increase their income.

However, there are many challenges unique to freelancing, and it demands more time and effort than salaried work — including self-management, business development, communication, and staying on top of industry information.

You will also need to learn about taxes, and simply doing your job as an SE won’t be enough. That said, if the downsides of freelancing don’t bother you, going freelance may be the right path for you.

IT Consultant

While many SIer professionals choose to transfer to another SIer, transitioning to IT consulting — a different industry — is also a strong option. Even though the field is different, as an IT consultant, the practical skills and knowledge you have built at a SIer can be directly applied to solving business challenges.

Since IT consultants use technology to help clients solve management challenges, you will be working on more upstream processes than you would at a SIer.

Required Skills for IT Consultants

The skills that are transferable and required when transitioning to IT consulting are as follows.

IT consultants make proposals to client companies on how to address their challenges, working on more upstream processes than SIers, which requires strong logical thinking and communication skills. Your SIer experience and system development knowledge won’t go to waste — in fact, it enables you to put together more concrete, actionable proposals.

Project management skills are also necessary, as you will be overseeing the overall progress of projects.

Who Should Consider Transitioning to IT Consulting

Those who should consider a transition to IT consulting are as follows.

Since unexpected issues can arise during project execution, those who can think logically and identify solutions are especially well-suited for IT consulting.

As a consultant, you are expected to provide appropriate recommendations to client companies, which means staying on top of market trends and economic conditions is a constant requirement.

Furthermore, because consultants serve as the driving force of a project, this role demands individuals who are both mentally and physically robust.

IT Sales

For those who have been working as SEs at a SIer, transitioning into a sales role within the IT industry is also a strong option. In sales, deep knowledge of the products you are selling is essential. Having worked at a SIer, you already have extensive knowledge of the IT field, which means you can understand your products in depth and make well-tailored proposals to customers.

While the goal is still to solve customers’ challenges, the level of responsibility is lighter than that of an IT consultant, and the potential to earn incentives based on performance is another attractive aspect of the role.

Required Skills for IT Sales

The skills required for IT sales roles are as follows.

In IT sales, your experience working at a SIer will be a direct asset. However, since IT encompasses much more than just system development, you may need to study additional areas depending on your employer. To make the most of your existing knowledge, transitioning into IT sales is a smart move.

Additionally, since it is a sales role, strong communication skills and resilience are essential. As the primary duties involve client outreach and negotiations, the ability to build trust through communication will be a key strength.

Who Should Consider Transitioning to IT Sales

The following types of people are well-suited for a transition to IT sales.

Those with strong communication, presentation, and negotiation skills are well-suited for IT sales. Others who are a good fit include people with strong problem-solving abilities and calm judgment, as well as those who find fulfillment in helping clients resolve their challenges.

Keep in mind, however, that you will be interacting far more with external stakeholders than you did as a SIer employee, so this role is not recommended for those who find that kind of constant external communication stressful.

Common Reasons People Leave SIer Companies

People who are considering leaving a SIer have a variety of reasons for doing so. While some are motivated by positive goals — such as career advancement — the reality is that many leave for negative reasons, such as wanting to escape a harsh work environment.

Below, we will highlight six of the most common reasons people leave SIer companies.

If your reasons for leaving are unclear, you risk feeling the same dissatisfaction even after changing jobs. Take a moment to think carefully about why you want to leave.

1. Excessive Overtime

Many SIer companies require long hours, and excessive overtime is one of the most commonly cited reasons for wanting to leave.

In system development environments, it is very common for projects to fall behind schedule, and errors and bugs can consume significant amounts of time. Depending on the deadline, you may be pushed into situations where working through the night or coming in on weekends is unavoidable.

Physical and mental exhaustion leads to reduced productivity, which in turn delays project progress, creating a vicious cycle. For those whose primary reason for wanting to leave is excessive overtime, roles with fewer overtime demands or that aren’t tied to strict deadlines are recommended.

2. Low Salary

Particularly at small and mid-sized SIer companies, salaries tend to be difficult to grow, leading many employees to feel dissatisfied with their compensation.

The IT industry is characterized by a multi-layered subcontracting structure, where work may be delegated through second-, third-, and even fourth-tier contractors. Smaller SIer companies often end up in these downstream positions, and the more intermediaries involved, the smaller the compensation received.

Working long hours without receiving commensurate pay drives many people to leave.

That said, this is not universally true. For SIers that receive direct contracts from client companies (first-tier contractors), salaries can be significantly higher — some companies even offer annual salaries exceeding 10 million yen. If low pay is your only concern, transitioning to a large SIer that handles upstream processes may be the right move.

3. Stress from Being Stationed at Client Sites

SIer professionals may be required to work on-site at client locations, which can be a significant source of stress for some. While you commute like a regular employee, you are always perceived as an outsider at the client’s workplace, and many people find it takes time to feel comfortable in that environment.

Reduced communication, feelings of isolation, and lingering awkwardness can make it difficult to adapt — and for some, this becomes the tipping point that makes them want to leave.

4. Constant On-call Support Regardless of Day or Time

SIer professionals may find themselves responding to errors and bugs at any hour — evenings, weekends, and holidays included.

When the systems you are responsible for run during business hours, releases can only happen at night or on weekends, making irregular working hours a common reality. If a critical error occurs that must be resolved before the next business day, working through the night is simply expected — meaning even your days off may never feel truly restful.

For those who want a clear boundary between work and personal life, transitioning to a role without overtime or unexpected after-hours tasks is the recommended path.

5. Desire for More Autonomy at Work

Some people consider leaving a SIer because they want a role with greater autonomy. At SIers, you are primarily tasked with developing systems according to IT strategies determined by the client, leaving little room to make proposals or exercise independent judgment — which can lead to a sense of monotony.

For those who want to be involved in strategic planning, transitioning to IT consulting is the recommended path. IT consultants focus on solving business challenges through technology, and the role comes with a much wider scope for independent decision-making.

6. Pursuit of Further Skill Development

Some people leave a SIer for a positive reason: they want to grow their skills. At SIers that handle downstream processes, engineers are sometimes brought in after requirements have already been defined and basic design is complete — with only the system build remaining.

In other words, those who are interested in upstream tasks — such as requirements definition and system design — that are only accessible at higher levels tend to consider making a move. Additionally, since upstream roles tend to offer better compensation, many people are also motivated by the prospect of a higher salary.

4 Key Points to Keep in Mind When Changing Jobs from a SIer

Changing jobs from a SIer can significantly alter your working style, even when moving to a closely related field. Before making the transition, review the following important points.

Each of the four points above is explained in detail below.

1. Insufficient Skills Can Prevent You from Landing a New Role

When changing jobs from a SIer, a lack of skills can sometimes be the reason a new role doesn’t materialize. Even if you are dissatisfied with your current situation, without sufficient engineering skills, you won’t be able to get into a better SIer, let alone a different type of company.

In your 20s, potential is taken into account alongside skills, and some companies may hire you based on your growth potential alone. However, once you reach your 30s, employers expect you to be immediately effective — making it harder to land a new role if your skills fall short. As a first step, assess whether your current skill set and experience are sufficient to reach the companies you are targeting.

If you can’t find good opportunities at your current level, it is recommended that you invest time in skill development before beginning your job search.

2. Inability to Self-Promote Can Prevent You from Landing a New Role

In a job search, if you can’t effectively promote yourself, you won’t land a new role. Even if you have strong system development skills, a lack of communication skills can stall your job search.

For this reason, if you feel uncertain about your communication abilities, it is recommended to take stock of your skills and the tasks you have been involved in, analyze what your strengths are, and decide in advance what to highlight in your application.

3. Your Salary May Decrease

When changing jobs from a SIer, your salary can go up or down. SIer compensation tends to be relatively high compared to the broader IT industry, so choosing a role with shorter working hours or less responsibility may result in a pay cut.

Similarly, if you choose a venture or startup because you want to focus more on hands-on programming, your salary will likely be lower.

Many people assume that changing jobs automatically means a higher salary, but pursuing a better work-life balance or more fulfilling work can come at the cost of a lower salary. Be clear about what you are prioritizing in your career change.

4. Changes in Work Content and Working Style Can Lead to New Sources of Stress

Changing jobs doesn’t automatically eliminate the stress you’ve been experiencing. While moving to a better SIer may mean your day-to-day work changes very little, switching industries or roles entirely can introduce new forms of stress from unfamiliar work content or ways of working.

For example, you might leave to escape excessive overtime, only to find that while the overtime is gone, so is your sense of autonomy — leaving you even more stressed. Things don’t always go smoothly. Acknowledge that career changes carry the risk of not working out as planned, and think carefully about what kind of work and working style you truly want before making your move.

4 Tips for a Successful Career Change from SIer

A successful career change from a SIer could lead you to a workplace where you can thrive for the rest of your career. Keep the following points in mind to make your transition a good one.

Each of these points is explained in detail below.

Take Stock of Your Skills and Experience

First, take a thorough inventory of the skills and experience you have accumulated as a SIer professional. Doing so clarifies what you can bring to your next employer, making it much easier to present a compelling self-introduction in interviews.

Don’t limit yourself to formal projects and tasks — also think about soft skills you’ve developed over time, such as communication, leadership, logical thinking, and presentation ability. The more detailed your inventory, the clearer your strengths and suitable roles will become, helping you avoid a poor fit with your next employer.

Frame Your Reasons for Changing Jobs Positively

When changing jobs from a SIer, it is important to frame your reasons for leaving in a positive light. Stating negative reasons — such as “the pay was low,” “there was too much overtime and weekend work,” or “I had poor relationships with colleagues” — gives the interviewer the impression that you are speaking poorly of your former employer.

It may also lead them to wonder whether you would leave quickly if something similar came up in the new role. For this reason, make sure the reasons you share in interviews leave a positive impression.

Be Able to Articulate Why You Can Add Value to Your New Employer

Be ready to confidently explain how you can contribute to the company you are applying to. If you can clearly articulate the value you bring, it makes it easier for the hiring team to visualize you in the role — and leaves a lasting impression.

However, to make a compelling case, you need a solid understanding of the company you are targeting. Before submitting your application or attending an interview, gather information about the company, compare it with your own skill set, and clarify how you can contribute.

Receive a Job Offer Before Resigning from Your Current Position

When changing jobs, always make sure you have a job offer in hand before leaving your current employer. Even if you are eager to leave quickly, resigning without another role lined up means losing your source of income.

While conducting your job search after resigning has the benefit of allowing you to focus fully on the process, if you don’t secure a new position quickly, financial strain can set in.

There is also the risk of making a hasty decision and ending up in a role that doesn’t satisfy you. For this reason, it is recommended to steadily work through your job search during evenings and weekends while still employed.

If you’re looking to take a break and recharge after resigning, make sure you have saved enough to cover that period before leaving, and then begin your job search from there.

Summary

The recommended career change destinations for SIer professionals are as follows.

The options above are career paths where you can take on more upstream processes, improve your skills, and advance your career compared to working at a SIer. Whatever your reason for leaving, if you want to continue working in the IT field, please use this article as a reference.

To make your career change a success, keep the following four points in mind.

• Take stock of your skills and experience
• Frame your reasons for changing jobs positively
• Be able to articulate why you can add value to your new employer
• Receive a job offer before resigning from your current position

By keeping these points in mind, you will be able to fully convey your strengths and selling points, and make a strong impression on hiring managers. Whether you already have a specific company in mind or are just beginning your job search, be sure to keep these tips front and center.