Mistake 1: Generic Bullet Points
Bullets that say 'responsible for managing team' or 'helped with various projects' tell the reader nothing. Strong bullets follow a structure: action verb + specific task + measurable outcome. 'Led 8-person engineering team to ship customer dashboard, reducing support tickets 34% YoY' is one sentence that conveys leadership, scope, action, and impact. Generic bullets signal you either didn't do meaningful work or can't articulate it — both are disqualifying.
Mistake 2: Listing Responsibilities Instead of Achievements
Job descriptions tell you what you were supposed to do. Resumes should tell readers what you actually accomplished. The difference: 'Managed marketing budget' vs 'Managed $1.4M marketing budget across 6 channels, delivering 22% above pipeline target.' The first is a job title rewritten as a bullet. The second is evidence of impact.
Mistake 3: Missing or Weak Quantification
Numbers create credibility. Even rough estimates beat vague claims. 'Improved customer satisfaction' is forgettable. 'Improved CSAT from 3.8 to 4.4 over 18 months across 240+ accounts' is concrete. If you don't have exact numbers, estimate honestly: team sizes, budget ranges, percentage improvements, customer counts, project values. A resume without numbers reads like a wish list.
Mistake 4: Inconsistent Formatting
Different bullet styles in different sections. Mixed date formats. Inconsistent capitalization in job titles. Periods at the end of some bullets and not others. Different fonts pasted in from various sources. These are small individually but accumulate into 'this person is sloppy' — exactly the impression you don't want for a role requiring attention to detail.
Mistake 5: Burying the Most Relevant Experience
If your most relevant experience is in a role from three jobs ago, the standard reverse-chronological format buries it on page two. Solutions: lead with a strong professional summary that highlights the relevant background, expand the bullets in the relevant role and contract the others, or use a skills-forward format that lets you lead with capabilities.
Mistake 6: Resume Length Mismatch
Two-page resume for a junior role with three years of experience: too long. One-page resume for a senior leader with 18 years of relevant scope: too compressed. Match the length to your actual career stage. Hiring managers can tell when content has been padded or compressed unnaturally.
Mistake 7: Skipping Keywords From the Job Description
If the job description says 'Salesforce' and you have Salesforce experience but didn't list it, you're getting filtered. Read the posting carefully and ensure every legitimate skill, tool, or qualification you have appears somewhere in your resume.
Mistake 8: Outdated or Irrelevant Information
Listing technologies you used in 2008. Including high school education when you have a college degree. Hobbies that don't connect to your candidacy. Old certifications that have expired or been superseded. Each line on your resume should be earning its space.
Mistake 9: Weak Professional Summary
'Detail-oriented professional with strong communication skills seeking opportunity to grow' — this could be anyone, applying for anything. Strong summaries position you specifically: 'Operations leader with 8 years scaling B2B SaaS support orgs from 5 to 40+, with track record of reducing ticket-to-resolution time 40%+ while raising CSAT.'
Mistake 10: Typos and Grammatical Errors
Read your resume out loud. Have someone else read it. Use grammar tools but don't trust them blindly — they miss context errors. A single typo in your contact info or company name is sometimes immediate disqualification. The resume is a writing sample. Treat it like one.