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Information Technology and Software · Modernisation and migration companies
HR for Application Modernisation and Legacy Migration Companies: Old Systems, Rare Skills and Cutover Weekends
A modernisation company moves old applications to new platforms for clients who cannot afford to stop. Here is how to hire rare legacy skills, train for new ones and manage cutover weekends and client-site teams.
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Share your requirementsAn application modernisation and legacy migration company helps clients move from old systems, such as mainframes, COBOL, old Java or .NET stacks, on-premise databases and desktop applications, to cloud, modern frameworks and new data platforms. Its people are architects, analysts who read old code with no documentation, developers, database specialists, testers, project managers and cutover leads. The old systems are critical to banks, insurers, manufacturers and government bodies, so mistakes are costly. Skills on the old side are rare and ageing, and often held by clients' own retiring staff. Teams read code written decades ago, reconstruct business rules, then rebuild and test it on new platforms. Delivery is organised in phases, with cutover weekends and parallel runs that need long shifts. Work is often on client sites or under client security rules. Engineers worry about their own skills going stale if they work only on old technology. See also HR for IT and software companies.
- Plan
- Hire
- Onboard
- Manage
- Develop
- Perform
- Engage
- Retain
- Exit
- Improve
When HR is weak in modernisation and migration companies, you may see
- Legacy skills are scarce
- Engineers fear skill decay
- Knowledge lives with client retirees
- Cutover weekends are brutal
- Client site and security rules
- Mixed teams of old and new
- Fixed-price pressure
- Staff on bench between projects
These are the places the people side of this kind of business tends to give way. The rest of this page works through them.
Who does the work in modernisation and migration companies
HR here has to work for each of these groups, not only the office. The set-up below is written with all of them in mind.
- Solution architects and migration leads
- Legacy analysts and code readers
- Developers on old and new stacks
- Database and data migration engineers
- Testers and cutover coordinators
- Delivery and project managers
- Client-site support and DevOps engineers
Roles we help you hire in modernisation and migration companies
GullyHR runs talent acquisition for permanent roles in modernisation and migration companies. For each role we agree the job description with you, find and screen candidates against it, and support the offer through to joining. Tell us the role and the number of people, and we start there.
Job descriptions for this sector
Share a hiring requirementTalent acquisition services →IT and specialised recruitment →Role design and job descriptions →
We recruit permanent employees. We do not supply contract or temporary staff.
We set up the interview and hiring process for modernisation and migration companies
Every business interviews, but few have a written process that works the same way for every role and every interviewer. GullyHR designs yours, from the role brief to the offer, trains your managers to run it, and can run it for you on the roles you hand us.
1. Role brief and scorecard
We agree what the role must deliver, the must-have and nice-to-have skills, and how each will be scored.
2. Stages and sequence
Screening call, assessment, interview rounds and decision points, sized to the role and the number of people you hire.
3. Question bank and scoring
Structured questions for each role family and a rating guide, so two interviewers judge the same answer the same way.
4. Interviewer readiness
A short briefing for your managers on what to ask, what to avoid and how to give a clear yes or no.
5. Offer and follow-up
Who approves, how the offer is made, and how candidates are kept informed from first call to joining.
Where HR strains in modernisation and migration companies
Legacy skills are scarce
Few engineers know the old language and system, and the company competes for them with clients and rivals.
Engineers fear skill decay
A developer who spends two years on old code worries about being unemployable elsewhere and leaves for modern work.
Knowledge lives with client retirees
The only people who understand the business rules are near retirement at the client, and handover may be missed.
Cutover weekends are brutal
Teams work through nights to switch systems, and a failure means rollback, blame and exhaustion.
Client site and security rules
Staff work under client policies, with restricted devices, limited access and different cultures, making supervision harder.
Mixed teams of old and new
Veterans of old systems and young cloud engineers misunderstand each other, and respect is uneven.
Fixed-price pressure
Estimates assume code is simple, then hidden complexity appears and the team is asked to catch up through overtime.
Staff on bench between projects
Engineers wait between migrations, and the company must decide whether to train, redeploy or let them go.
HR topics for modernisation and migration companies
Start with the topics that matter most here: Recruitment and Talent Acquisition; Learning and Development; Retention and Attrition Management. Then work through the rest. Each topic is written for information technology and software, not in general.
Recruitment and Talent Acquisition
Requisition to joining, the same way every time.
Learning and Development
Training planned from need rather than from the calendar.
Retention and Attrition Management
Who leaves, when, why — and which of them mattered.
HR Strategy and Workforce Planning
How many people, in which roles, by when — and what they will cost.
Organisation Design
Structure, reporting lines and who is allowed to decide what.
Onboarding and Probation
A first day that is the same for the fifth joiner as the first.
Employee Administration
Records, attendance, leave and the day-to-day HR that must simply work.
Compensation, Payroll and Benefits
Salary structure, payroll inputs and a month that closes on time.
Performance Management
Goals, reviews and ratings that hold up in a conversation.
Career and Succession Management
Named backups for the roles that cannot be vacant.
Employee Engagement and Experience
Communication, recognition and the conditions people actually work in.
Employee Relations
Two routes — one for complaints, one for conduct — kept separate.
Policies, Compliance and Governance
Policies a manager can apply, and obligations with owners and dates.
Health, Safety and Wellbeing
Induction, records, incident reporting and follow-through.
Exit and Alumni Management
Resignation to relieving letter, in a defined order.
HR Technology and Automation
Records that survive people, and approvals that do not queue.
HR Analytics and Management Reporting
A short monthly pack management actually reads.
HR Operations and Governance
An HR function that runs the same way every month.
What a working HR set-up looks like
The pieces a modernisation and migration companies business puts in place, in an order that makes each easier. Open any card for the detail.
Build a scarce-skills plan
A map of legacy skills needed and a mix of hiring, retired experts as advisers and internal training.
What this coversHide
Build a scarce-skills plan
A map of legacy skills needed and a mix of hiring, retired experts as advisers and internal training.
What this coversHide
A map of legacy skills needed and a mix of hiring, retired experts as advisers and internal training. The recruitment process can support it.
Offer a skills path
Rotation between old and new work, certifications and recognition so engineers see growth.
What this coversHide
Offer a skills path
Rotation between old and new work, certifications and recognition so engineers see growth.
What this coversHide
Rotation between old and new work, certifications and recognition so engineers see growth. The learning and development process helps.
Capture client knowledge early
Interviews, recorded walkthroughs and shadowing before key client people retire, with a named owner.
What this coversHide
Capture client knowledge early
Interviews, recorded walkthroughs and shadowing before key client people retire, with a named owner.
What this coversHide
Interviews, recorded walkthroughs and shadowing before key client people retire, with a named owner.
Plan cutover rotas
Shift plans, rest before and after, food and travel arrangements and a decision point to roll back.
What this coversHide
Plan cutover rotas
Shift plans, rest before and after, food and travel arrangements and a decision point to roll back.
What this coversHide
Shift plans, rest before and after, food and travel arrangements and a decision point to roll back. See the attendance, shift and leave process.
Set client-site working norms
Briefings on client rules, a company contact and regular check-ins for staff placed at client sites.
What this coversHide
Set client-site working norms
Briefings on client rules, a company contact and regular check-ins for staff placed at client sites.
What this coversHide
Briefings on client rules, a company contact and regular check-ins for staff placed at client sites. Confirm contract details with a qualified professional.
Plan for bench time
A learning list, internal tools to build and clear rules on how long a person can wait between projects.
What this coversHide
Plan for bench time
A learning list, internal tools to build and clear rules on how long a person can wait between projects.
What this coversHide
A learning list, internal tools to build and clear rules on how long a person can wait between projects.
Start by checking where you stand
Before changing anything, find out what is true today. These checks take an afternoon and tell you which of the topics above to start with.
Share your requirements- List the legacy skills you need in the next year and who holds them.
- Ask engineers on old stacks what worries them about their careers.
- Check whether client knowledge from retiring staff has been recorded.
- Look at the last cutover weekend: hours, rest and aftermath.
- Ask staff at client sites how supported they feel.
- Review how estimates account for hidden complexity.
- Confirm with a qualified professional the employment, overtime and client-confidentiality rules that apply to you.
Confirm with a qualified professional. What applies to you depends on your business, your state and your arrangements, and it changes. This page describes practice. It does not state a legal position.
How GullyHR helps
The services below fit this kind of business best. Each starts by recording where you stand, and every later report compares against that. We do not promise outcomes.
- Recruitment process
Hiring for scarce legacy skills, including advisers and returnees.
- Learning and development
Skill paths that keep legacy engineers employable.
- Attendance, shift and leave
Cutover rotas with rest and fair compensation.
- Employee onboarding
Briefing for staff placed at client sites.
Start with a free conversation, or see the paid HR Diagnostic.
Our HR transformation approach
- 1
Assess
Understand the business, its workforce, current processes and HR challenges.
- 2
Identify gaps
Find the missing, weak, inconsistent or person-dependent processes.
- 3
Design
Create the structure, processes, policies, SOPs, dashboards and systems needed.
- 4
Implement
Help HR and department managers actually adopt the new system.
- 5
Automate
Digitise repetitive and approval-based workflows where it is worth doing.
- 6
Measure
Track hiring, attendance, employee cost, performance, training and attrition.
- 7
Improve
Strengthen the people-management system continuously, not once.
Blogs worth reading first
From the GullyHR blog: one on HR in information technology and software, and one on each of the topics this page points to.
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Questions owners ask
Look at career-switchers, retirees as advisers and trainable engineers, and offer clear learning and project variety.
Rotate them between old and new work, fund certifications and show a visible path to modern roles.
A written plan with shifts, rest, meals, travel and decision points, and time off after the event.
Start capturing it early through interviews, recordings and shadowing, and agree a handover plan with the client.
Use a bench plan with training, internal work and clear communication. Avoid long unplanned waits.
We would ask which skills are scarce, how cutover weekends are staffed and how engineers see their careers. A sensible first piece of work is a scarce-skills hiring plan, a cutover rota and a skills path. Scope and fees are agreed in writing afterwards.
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