The Complete Resume Writing Guide

Why Most Resumes Fail

Most resumes never get a fair read - not because the candidate was unqualified, but because the software couldn't make sense of them.

Before a recruiter sees anything, an Applicant Tracking System parses, ranks, and surfaces applications by how well they match the role. A resume that misses the job's key terms, or uses a format the parser mishandles, can get buried or ranked below better-matched applications. It isn't necessarily auto-rejected - it just fails to surface.

The resumes that do get through face another challenge: recruiters spend an average of 6-7 seconds on initial review. Six seconds to decide if you're worth a closer look.

Your resume has two jobs:

1. Get past the ATS (Applicant Tracking System)
2. Grab attention in 6 seconds

Most resumes fail at one or both. This guide helps you succeed at both.

Choosing the Right Format

There are three standard resume formats. The right choice depends on your situation.

Chronological (Most Common)

Lists experience in reverse chronological order-most recent job first.

Best for: Traditional career paths with steady progression in the same field.

Use if: Your recent experience is your strongest selling point.

Functional (Skills-Based)

Organizes by skill categories rather than timeline.

Best for: Career changers, people with gaps, or those re-entering the workforce.

Caution: Many recruiters don't like this format because it can hide things. Use sparingly.

Combination (Hybrid)

Skills section up top, followed by chronological experience.

Best for: Experienced professionals who want to highlight specific skills while showing career progression.

See our detailed guide on resume formats →

Resume Sections Explained

Contact Information

Keep it simple:

• Name (make it prominent)
• Phone number
• Email (professional-not [email protected])
• LinkedIn URL (customized if possible)
• City/State (full address isn't necessary anymore)
• Portfolio link (if relevant to your field)

Professional Summary

2-3 sentences at the top that answer: "Who is this person and why should I keep reading?"

This is not an objective statement ("Seeking a challenging position..."). It's a highlight reel.

Tailor this for each application. Use keywords from the job description.

Experience

This is the core of your resume. For each position, include:

• Job title
• Company name
• Dates (month/year to month/year)
• 3-5 bullet points focusing on achievements

We'll cover how to write great bullets in the next section.

Education

Include:

• Degree and major
• School name
• Graduation year (optional if it's been 10+ years)
• GPA only if it's strong (3.5+) and you graduated recently
• Relevant coursework, honors, or activities (for recent grads)

If you have significant work experience, education goes at the bottom. If you're a recent grad, it can go near the top.

Skills

List hard skills relevant to the job. This is also where ATS looks for keyword matches.

• Technical skills: Software, tools, programming languages
• Industry skills: Methodologies, certifications, domain knowledge
• Soft skills: Include sparingly and only if they're in the job description

See our guide to resume keywords by industry →

Optional Sections

• Certifications: If relevant to the role
• Projects: Especially useful for recent grads or career changers
• Volunteer work: If it demonstrates relevant skills
• Publications/Speaking: For thought leadership roles

Writing Achievement-Focused Bullets

This is where most resumes fall flat. They list duties instead of achievements.

Duty vs. Achievement

The Formula: Action Verb + Task + Result

Every bullet should follow this pattern:

[Strong verb] + [What you did] + [Quantified result]

• "Reduced customer onboarding time by 40% by redesigning the signup flow"
• "Led cross-functional team of 8 to launch product 2 weeks ahead of schedule"
• "Increased email open rates from 18% to 32% through A/B testing subject lines"

Strong Action Verbs

Start every bullet with a strong verb:

• Leadership: Led, Directed, Managed, Oversaw, Coordinated
• Achievement: Achieved, Exceeded, Delivered, Completed
• Improvement: Increased, Reduced, Improved, Streamlined, Optimized
• Creation: Built, Designed, Created, Developed, Launched

Quantify Everything

Numbers make your achievements concrete and credible.

• Percentages: "Increased by 45%"
• Dollar amounts: "Generated $500K in new revenue"
• Time: "Reduced processing time from 3 days to 4 hours"
• Volume: "Managed portfolio of 150 client accounts"
• Rankings: "Ranked #2 out of 50 sales representatives"

If you don't have exact numbers, estimate reasonably or use ranges.

ATS Optimization

An Applicant Tracking System scans your resume before any human sees it. If it can't parse your resume correctly, you're filtered out-regardless of qualifications.

ATS-Friendly Formatting

• Simple layout: Single column, no tables or text boxes
• Standard fonts: Arial, Calibri, Times New Roman
• Standard headings: "Experience" not "Where I've Made an Impact"
• No headers/footers: ATS often ignores these
• File format: .docx or text-based .pdf

Keyword Optimization

ATS scores your resume based on keyword matches with the job description.

• Mirror their language: If they say "project management," use that exact phrase
• Include both acronyms and full terms: "Search Engine Optimization (SEO)"
• Use keywords naturally: Don't stuff them in-use them in context

This is tedious to do manually for every application. MORT's Resume Builder handles it automatically-it reads the job description, identifies the key terms, and weaves them into your resume naturally.

See our complete ATS optimization guide →

Tailoring Your Resume

One resume for all applications = one generic resume that impresses no one.

This doesn't mean rewriting your resume from scratch for every job. It means strategic adjustments:

What to customize

• Professional summary: Rewrite to match what they're looking for
• Skills section: Reorder to put their priorities first
• Experience bullets: Highlight the most relevant achievements
• Keywords: Mirror their job description language

How to do it efficiently

Yes, this takes time. Manually tailoring a resume properly takes 30-60 minutes per application. If you're applying to 20 jobs, that's 10-20 hours just on resumes.

This is exactly what MORT's Resume Builder automates. Upload your master resume once, select a job, and MORT analyzes the job description, reorders your skills, adjusts your summary, and optimizes keywords-in about 2 minutes. Same tailoring, fraction of the time. It also generates a tailored cover letter for each application.

Common Mistakes to Avoid

Formatting mistakes

• Walls of text: Use bullet points and white space
• Tiny fonts: Nothing smaller than 10pt
• Inconsistent formatting: Same style throughout
• More than 2 pages: Unless you're very senior or in academia

Content mistakes

• Listing duties, not achievements: Show impact
• Vague statements: "Responsible for various tasks"
• Irrelevant information: High school jobs (unless recent grad)
• Personal information: Photo, age, marital status (in the US)
• References "available upon request": They know. Don't waste space.

Strategic mistakes

• Same resume for every job: Tailor it
• Ignoring ATS: Format for machines first
• Burying the good stuff: Best content should be immediately visible
• Typos: Proofread. Then proofread again.

Examples by Experience Level

Entry-level / Recent Graduate

• Lead with education if it's your strongest qualification
• Include internships, projects, and relevant coursework
• Emphasize transferable skills from any work experience
• Keep to one page

Mid-career (3-10 years)

• Lead with experience
• Focus on achievements and progression
• Be selective-include only relevant roles
• One page preferred, two max

Senior / Executive

• Emphasize leadership and strategic impact
• Include scope: team size, budget, revenue responsibility
• Two pages is acceptable
• Consider an executive summary section

See detailed resume examples for different roles →