01 / Interviews
Explain your work under pressure.
Projects, trade-offs and mistakes, in answers that sound like you and not like a script. Technical and behavioural, including US-company style interviews.
Private English lessons · Online · B2 to C1
You know the answer. Now say it in English.
One-to-one lessons for professionals, especially engineers, who need English for interviews, presentations and the conversations that happen at work. Taught by a native US speaker who spent over ten years in tech and startups.
Ask about private lessons
$50 · 50 minutes
Rated 4.8 by 37 students on Preply
lesson-notes.diff
Before: Can you explain me the requirement?
After: Could you walk me through the requirement?
- 4.8
- average from 37 student reviews on Preply
- 1,513
- lessons taught on Preply
- Top 15%
- of English tutors on Preply
- 10+
- years in technology, startups and business
From my Preply profile (referral link, opens in a new tab), checked 9 October 2026. 5 years teaching English.
Where it helps
The English you need is specific.
You are good at your job. The gap is saying what you know quickly, clearly and naturally in the moments that matter. Lessons go straight at those moments.
02 / Presentations
Say it in order, then defend it.
Open with the point, walk through a technical argument, and handle the hard question from the back of the room without losing your thread.
03 / Meetings
Stand-ups, reviews, one-to-ones.
Disagree politely, ask for clarification, give feedback and steer a discussion back on track, with international teams and managers.
04 / Writing
Messages that get acted on.
Pull request descriptions, Slack threads, emails and documents with wording that is precise, natural and easy to act on.
How I teach
Practical, direct, and about you.
Your material, not a textbook.
Bring the talk, the job post, the message you cannot quite word, or a recording of a meeting that went badly. That is the lesson.
I fix what actually costs you.
Not every mistake matters. I focus on where your meaning gets lost or sounds unnatural to a native ear, in the situations you care about.
You leave with words for today.
We practise the exact phrases out loud until they are yours, so the same afternoon you can use them in the meeting, the interview or the message.
meeting.diff
Before: I am working on this system since three years.
After: I've been working on this system for three years.
standup.diff
Before: The problem is I don't have time to finish this.
After: I'm blocked on this. I'll need more time to finish it.
Illustrative examples of common fixes. They are not taken from any student.
In students' own words
Student reviews
“Thanks to Mack's interview prep, I was able to successfully pass my interview! His advice is incredibly helpful, especially for those preparing to work in the U.S. or with American companies.”
“I've become much more confident speaking English, both at work and in daily life, especially when making small talk and connecting with people.”
“Mack leads the conversation positively and provides helpful feedback.”
“He patiently and thoroughly explained the language nuances until I fully understood.”
Quoted word for word from public reviews on my Preply profile (referral link, opens in a new tab), where all 37 reviews are public.
About Mack
A teacher who has sat in your meetings.
I am Mack, a native English speaker from the US, living in Bangkok. Before I taught, I spent more than a decade in technology and startups: working with international teams, leading projects and pitching to investors. These days I teach adults from around the world, especially software engineers, tech professionals and founders.
Most of my students already understand English well. Their challenge is using it confidently when the pressure is real. So we practise the language of the job, not generic business English from a textbook.
- Professional Tutor on Preply, with a verified teaching certificate
- Computer Science degree, University of Georgia (2013 to 2017), diploma verified on Preply
- 5 years teaching English, 10+ years in technology, startups and business
How it works
You choose the times. I confirm.
- Format
- Online
- Length
- 50 min
- Price
- $50
Step 1: Send an inquiry
Your goal, your level, and the days and times that suit you, with your time zone. Two minutes, no account.
Step 2: I confirm by email
I check my calendar and reply personally to confirm whether I am free at those times, or suggest the closest ones.
Step 3: We start
Bring real material to the first lesson. Nothing is booked or charged through this website.
Free while you decide
Useful today, no sign-up.
Printable guides for work English, plus a library of lessons and business-English topics. Take what helps.
All free resourcesQuestions
Straight answers.
Anything else? Put it in your inquiry, or email mcintyregrissom@gmail.com.
Who are these lessons for?
Adults at roughly B2 to C1 who can already hold a conversation in English and want it to be sharper at work. I built them for engineers and other tech professionals, and anyone in business at that level is just as welcome.
I think I'm below B2. Can I still ask?
Yes. Say so in your inquiry and I will tell you straight whether private lessons are the right next step. If they are not yet, the free resources on this site are a good place to build up first.
Browse the free resourcesHow much do lessons cost, and how long are they?
A lesson is 50 minutes, online, and costs $50.
How do I book, and which times can I choose?
Send an inquiry and tell me the days and times that suit you, with your time zone. I check my calendar and confirm by email whether I am available. Nothing is booked or charged through the website itself.
What do we actually do in a lesson?
We work on your real material: a talk you are giving, a job description, a message you need to send, or a recording of a meeting you want to handle better. I point out where your meaning gets lost or sounds unnatural, we practise the exact phrases you need, and you leave with wording you can use the same day.
Do you guarantee results?
No. I cannot honestly promise a score, a job offer or a timeline, because those depend on where you start, how much you practise, and things neither of us controls. What I do promise is lessons built around your real situations, with clear feedback you can use straight away.
Where are you, and are lessons online?
Lessons are always online. I am based in Bangkok, Thailand (UTC+7), so mention your time zone when you suggest times.
Can I try you on Preply first?
Yes. I also teach on Preply, and new students get 30% off a first lesson through my referral link.
Book a trial on Preply (referral link) (opens in a new tab)What happens to my details?
They are used only to reply to your inquiry.
Tell me what you are preparing for.
An interview, a demo, a difficult conversation. Send a few lines and the times that suit you, and I will reply by email.
Rather start on Preply? New students get 30% off a first lesson with my referral link (opens in a new tab).