You will usually be asked if you have the right to
unrestricted world wide travel. You will require visas for travel as crew to many countries including the USA. That might prove problematic as many of these countries require a full disclosure of all arrests, charges or convictions even if (in the case of the first two) a conviction didn't result.
The Rehabilitation of Offenders Act does not apply to US visa law and spent convictions,regardless of when they occurred will have a bearing on a traveler’s eligibility for admission into the United States